seiko 7a28 yacht timer

Regatta Yachttimers

An overview of sailing regatta watches.

The Seiko company was founded in 1881, when Kintarō Hattori opened a watch and jewelry shop in Tokyo. Eleven years later, in 1892, he founded the company Seikosha Co, where initially wall clocks were produced. Soon they were followed by pocket watches and watches with an alarm function. In 1913 Seiko (which means ‘precision’ in Japanese) manufactured its first wristwatch, and today the brand is well known for its inventions over the years.

Already in 1958 Seiko started with the developement of quartz movements, which let to the first commercial quartz wristwatch of the world in 1969, the Seiko Quartz Astron. The brand’s tradition in sports timing started at the 1964 Olympic Games in Tokyo, where they served as Official Timekeeper. Ever since Seiko has been involved in many sports events, eg athletics, football and sailing.

Early 1980’s Seiko developed the caliber 7A28, the world’s first analog quartz chronograph. This fully adjustable quartz movement has no plastic parts in the gear train and can be sericed and adjusted like a mechanical watch. In the years to follow the caliber 7A28 was used in a great number of different models. The 7A28-7020, for example, was worn by Roger Moore in the 1985 James Bond movie  ‘A View To A Kill’.

Seiko Yacht Timer Quartz 7A28-7090, ref. SAY080.

The 7A28-7090 regatta variant debuted in 1982 as the first real Seiko Yacht Timer, and appeared in catalogs as of 1983. It immediately stood out for its design. With the two big pushers at 10 and 2 o’clock it looked similar to a bullhead chronograph. The 9 o’clock minutes sub register features a 30-minutes counter, devided in 6 x 5 minutes in alternately light and royal blue, and a distinct yellow hand. On the outer ring of the dial there’s the yachting countdown scale for the seconds, running backwards from 60 to zero. After 1985 the Seiko Yacht Timer Quartz 7A28-7090 disappeared from the catalogs and the production ceased.

x – x – x – x – x – x – x – x – x – x

Second half of the 1980’s Seiko developed a new four jewel quartz chronograph, the caliber 8M. Besides setting the time, it also uses the crown as a selection tool by which you can choose the mode of the watch, as shown in one of the registers. It has a countdown (timer) function, what makes it highly suitable for a yachting watch. In timer-mode the movement runs actualy counterclockwise! The countdown timer can be set by one-minute intervals between 1and 30 minutes, or you can choose between one of the preset timers for 5, 10 or 15 minutes.

From early 1990 Seiko produced two series of yacht timer watches, the 8M35 and the 8M37 models . Compared to the 8M35 models, the 8M37 models have the movement mounted ‘up-side-down’. That automatically means the crown and pushers are placed on opposite sides.

Cal. 8M35-6000 with leather strap, two-tone case and bracelet (ref. SEQ008J) and full gold (ref. SEQ010J). Note the three different collorscemes of the inner compass.

In time-mode, when the watch shows the actual time, the hour hand seems a bit odd. More like a seconds hand actually. But when you switch to timer mode, you understand why. This hand then becomes the second hand for an accurate countdown. And as I said before, the movement runs counterclockwise in timer mode. In a short period of years, from 1990 upto 1993, several yachttimer models were released by Seiko.

Cal. 8M35-6010, the more rare silver version, cal. 8M35-8000/8009 (ref. SEQ001P) and 8M35-800A (ref. SEQ003P) with a plastic blue or black turnable bezel.

Both cal. 8M37-6000, either with a silver case and dial (ref. SBBH005) or with a black case and dial (ref. SBBH007). Originally with a black rubber strap.

Both cal. 8M37-7000, ref. SBBH009. Note the different selection tools.

Finally the cal. 6M37-8000, ref. SBBH013, and the 6M37-8019, ref. SGX006. The last one was released for the 1992 USA Olympic games.

You can download the Operating Instructions for the caliber 8M35 here , and a 8M37 Parts Catalogue  here .

Page from a Japanese magazine showing some of the cal. 8M37 models.

Seiko add for the U.S.A. Olympic Yacht Timer Sports 150 8M37-8019, ref. SGX006, 1992.

Variations:

Radiant Yacht Timer, in silver case ref. TUH996PM, or two-tone case ref. YUH999PM. Obviously both with a Seiko 8M37 movement.

Yema America’s Cup, with a Seiko 8M35 movement, white or black dial. More info in the Yema section.

In 1993 Seiko changed the design of their Yacht Timers radically. Again the brand developed a new quartz regatta movement, the caliber 6M37, this time inspired by the old mechanical movements that used the 5-dot countdown system (first used by Aquastar in the 1960’s ).

The first model that was released, is the cal. 6M37-6000.

1995 Seiko introduced the Yacht Timer Sports 200   models, as part of The Great Blue series. Inspired by the older mechanical movements, Seiko developed their quartz movement with the 5-dot countdown system, caliber 6M37-6010.

Seiko Yacht Timer Sports 200 with steel case and blue dial, ref. SKB003P, and two-tone case and silver dial, ref. SKB004P.

Model: Seiko Yacht Timer Sports 200.

• Reference: SKB003P steel case and rotating bezel, blue dial
•                   and blue leather strap.
•                   SKB004P steel case with golden rotating bezel,
•                   silver dial and blue leather strap.
• Caliber: Seiko 6M37 quartz yachttimer movement.
• Case size: Ø 42 mm / H 12 mm.
• Year: mid 1990’s.

In the operating manual you can read how the countdown system works, click  here to download the English version.

  x – x – x – x – x – x – x – x – x – x

At Baselworld 2007, Seiko launched a new marine collection, the Velatura. The collection included two new calibers, one of them the Yachting Timer caliber 7T84. Obviously Seiko stepped away from the 5-dot countdown system again.

Seiko Velatura Yachting Timer, SPC005P1 and SPC007P1.

Seiko Velatura Yachting Timer, SPC041P1 and SPC049P1.

Model: Seiko Velatura Yachting Timer.

• Reference: SPC005P1 silver dial with steel bracelet.
•                   SPC007P1 black dial with black rubber strap.
•                   SPC041P1 black dial with Brown leather strap.
•                   SPC049P1 titanium case with leather/nylon strap.
• Caliber: Seiko analogue quartz 7T84 movement.
• Case size: Ø 44 mm / H 12 mm.
• Year: since 2008 upto 2012(?).

You can download the instruction manual of caliber 7T84 here , and learn how the regatta countdown system works.

With the launch of the Velatura series in 2007, Seiko rose to the challenge to build watches that perform on the open ocean, with a collection characterized by robustness, high functionality and durability. Also in 2007, Seiko was selected as the Watch Partner of the International 49er Class Association.

To mark the fourth year of their partnership, Seiko launced a new model in the Velatura collection, a standard chronograph housing with the caliber 7T62 Alarm movement. Not with a special countdown function, but with a coloured 5-10-15 minutes subdial.

The watch is available with either a stainless steel case with black hard coating and a polyurethane strap (ref. SNAE17) or a stainless steel case with blue hard coating and a stainless steel bracelet with three-fold slasp (ref. SNAE19).

2014 update, new versions in the Velatura Yachting Timer series:

Seiko Velatura Yachting Timer: SPC143P1, SPC145P1, SPC147P1 and SPC149P1.

• References:
• SPC143P1 brushed and polished stainless steel case and bracelet – fixed blue bezel – blue dial.
• SPC145P1 brushed and polished stainless steel case and bracelet with rubber centre links – fixed black bezel – silver dial.
• SPC147P1 brushed and polished stainless steel case and bracelet with rubber centre links – fixed black bezel – black dial.
• SPC149P1 brushed and polished ion black stainless steel case with black silicone rubber strap – fixed black bezel – black textured dial.
• Caliber: Analogue quartz 7T84 movement.
• Case size: Ø 44 mm / H 11 mm.
• Year: 2014.
• many thanks to Robert Mahoney for the English version of the caliber 6M37 operating manual.
• many thanks to Yorkshire Watches ( http://www.yorkshirewatches.co.uk/ ) for using your pictures.
• http://www.seikousa.com/index.php  with Press Releases.
• http://en.wikipedia.org/wiki/Seiko
• http://www.watch-wiki.net/index.php?title=Seiko

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Seiko 7A28-7090; "Yacht Timer"

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Model: Seiko 7A28-7090

Year Produced: May 1983

The Dial: Three subdials, all differently styled, with the 30-minute chrono-timer being the standout attraction; royal blues with a complimentary yellow minute hand. The 3 o’clock subdial is a 1/10th of a second counter, and the 6 o’clock subdial is the live second hand.  The Case: This stands alone as the only vintage-y “field” watch style case in the 7A28 line up. Bead-blasted stainless steel, like the Ripley, but with curved matchstick lugs. Combined with the huge chrono-pushers, you end with a very unique looking watch!

The Movement: Inside is a 7A28, famous for not only being the world’s first analogue chronograph movement, but also being used in some of Seiko’s best known quartz offerings: the Ripley, the RAF, the Bond, the Steering Wheel, and the Bishop to name a few. Honestly, the most impressive thing about this 40+ year old watch is how perfectly it functions. While editing the video for this watch, at 60fps, I was delighted to see that the chronograph main-hand, the 1/10th subdial, and the 30-minute subdial all move together on the same frame. Maybe we're easily impressed, but we thought it was cool Seiko that nailed the coordinated accuracy on the first iteration.  The Condition: It’s in great condition overall. Everything is functions correctly and smoothly, as it was recently serviced. The crystal is the original shape but has been upgraded to sapphire and is flawless. The bead-blasted case has a few minor markings. The case back has lots of hairline scratches. The strap is not original. Scope:  No box or papers. 

Movement : 7A28 Quartz Chronograph

Dimensions:

• Case Width: 40.0mm
• Case Thickness: 11.7mm
• Lug Width: 20.0mm

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Looking for a replacement for its 7A28 Yacht Timer, Seiko turned its attention to creating a far more focused set of regatta timers.  Whereas the first Yacht Timer was little more than a 7A28 with the correct color scheme, the Seiko 8M35 Yacht Timer – like the 1999 Seiko 8M35-8000 here, with its original stainless-steel bracelet – was created to time races.  In fact, the 8M35 is superior to the elusive 7A28 in every manner when used for regatta racing, and was purpose-built piece for sailors.

In sailing, the purpose of the watch is all about the countdown and ensuring one guides the boat at speed to the start line at exactly the right time.  Thus, this timing function is key. Unlike the 7A28, which felt a bit more mechanical in operation with traditional pushers and time setting crown, the 8M35 uses its crown more as a selection tool to move between watch complications.

Yacht racing requires a countdown period before the start of a race to help keep the boats as fairly placed as possible.  Before the start of a sailboat race, there are two guns, the first gun signals that the race will start in either five, 10, or 15 minutes (depending on the type of race sailed).

At the five minute mark, a gun is sounded and the sailors start their countdown functions and maneuver their sailboats as close to the start line as possible.  Once the end of the five minute blue period is reached, the race has begun.

Instructions: In its normal position, the crown can be moved forward or backward and this changes the mode of the watch.  The mode is shown in the lower register and is highlighted by a black triangular hand that outlines the pie-shaped mode indicator.

In time mode, setting the time is done by pulling the crown out one stop and then using the two pushers to change the hour and minute hands.  Setting 15/10/5 modes moves the needle-like hand to the appropriate countdown area on the upper track.  Then, the upper pusher stops and starts the timer and the lower resets.  The general timer allows for a countdown function of up to 30 minutes and the “Match 0” function allows both hands to be reset to 12:00. This Yacht Timer comes on its original bracelet, and with nylon strap, rugged travel case, and springbar tool.  The watch functions are set in an atypical manner, and a PDF of the instructions can be found, here .

1999 Seiko 8M35-8000 Yacht Timer, w/Original Bracelet

DIAL: The 8M35’s dial combines the typical yachting timer colors of red and blue – naturally, everything is highly legible.  Note the slightly blue shade of the index surround at the five minute countdown marker (otherwise, known as 11:00).  At first glance, this appears to the casual observer to be dial damage, but it’s on every dial, and strongly appears to be intentional – a visual cue for the wearer.

CASE: Stainless-steel case measures 39.5mm x 46mm.  The case features a rather tough-looking plastic and metal rotating on the 60 minute bezel – this renders a watch that looks like it could stand up to the typical knock around that likely occurs on a boat.  At a mere 10.5mm, this is a thin watch!

CRYSTAL: Slightly domed hardlex crystal, scratch-free.

BAND: Original stainless-steel Seiko-signed bracelet – bracelet is in great condition, but it is missing one of the blue accents (not highly noticeable); this watch also comes with a premium blue and red nylon strap.

MOVEMENT: 8M35 four jewel quartz movement, manufactured in February 1999.

CROWN: Unsigned stainless-steel crown.

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A Celebration of the early (Seiko) World Timers

• Add to quote

Vintage Seiko World Time - Collectors / Owners

• Production ran from March 1964 through Nov 1964
• In December 1964 the case back was changed to a Dolphin, but production was just for this single month - a photo of the dolphin is in the appendix
• You will see 3 GMT hands used here. The tapered gold-toned version belongs on the dark gray dial. The tapered black version belongs on early silver dials, likely through part of August 1964. The thin black GMT hand belongs on silver dials from August 1964 through the end of the run.
• Silver dials with code JAPAN 6217-7000 TAD are not very common - I wonder if these dials were used for the North American Market?
• COMING SOON: earlier examples of the silver dial with tapered GMT with updated photo
• Silver dial, MADE IN JAPAN, tapered black GMT
• Silver dial, MADE IN JAPAN, thin black GMT
• Silver dial, JAPAN 6217-7000 TAD, thin black GMT
• Dark gray dial, MADE IN JAPAN, tapered gold-tone GMT
• Silver dial, JAPAN 6217-7000 TAD, thin black GMT w/ Dolphin case back
• Possibly... Dark gray dial, MADE IN JAPAN, tapered gold-tone GMT w/ Dolphin case back
• Dark gray dial, COMING SOON...
• Silver dial, JAPAN 6217-7010 TAD, thin black GMT
• Dark gray dial, JAPAN 6217-7010 TAD, thin gold GMT
• Silver dial, MADE IN JAPAN, thin red GMT - RADIUM LUME
• Dark gray dial, JAPAN 6217-7000 TAD, thin red GMT - RADIUM LUME
• Silver dial, MADE IN JAPAN, with thin black GMT and no lume
• Dark gray dial, JAPAN 6217-7000 TAD with thin gold tone GMT and no lume
• WORLD TIME moves to 6-oclock on these new dials
• The indices at 12, 6 and 9 are lumed - with an additional dab of lume at 3 - next to the date window
• It appears that the lumed hands from the previous 7010 model are carried forward here
• but the GMT is all new - always red, and with a lumed arrow
• It is possible that some early production examples of the 6117-601X retained the cities bezel from the 6217-7010.
• Silver dial, 6010
• Silver dial, 6019 - RADIUM LUME
• Dark gray dial, 6010
• Dark gray dial, 6019 - RADIUM LUME
• Early dials carried forward the placement of WORLD TIME at 6-oclock, but later this was moved to 12-oclock
• The cities bezel was updated 3 times, and there are “right and wrong” bezels on different dials
• The gold-toned version was only produced in 1972, and had only one dial and bezel configuration
• In 1974-1975 there is a short run of the main black and white dial variants without lume. Dial codes on those end in 4
• Aftermarket dials, bezels and hands abound for this model - additional caution and scrutiny is required when shopping these!
• Moscow Dharan, Proof, 6400, WORLD TIME at 6
• Moscow Dharan, Proof, 6400
• Moscow Riyadh, Resistant, 6400
• London over GMT, Resistant, 6400
• London over GMT, Resistant, 6400 - No lume
• Moscow Dharan, Resist, 6409
• Moscow Riyadh, Resistant, 6409
• London over GMT, Resistant, 6409

Just fantastic. Thank you.  

Thank you for the info! Worth noting is the GMT hand in the 6117-640x is bent towards the tip to clear the indices.  

Thanks for using my bracelet pics above. I hadn't noticed as I looked at your link first and not your actual posting. The adjustment links are quite interesting in the 6117-6010 bracelet in that they are held together by small spring bars. Seiko only use this type of bracelet on a few models from the 1960's including some of the hand wound Sportsman bracelets. After that, they moved to cotter pins and later pin collar configurations (and annoyingly screws for some King Seiko VANAC and Grand Seiko bracelets). -Brian  

@jlatassa - yes, the "Uncle" bracelets I linked will fit the 19mm 6217's - They are my favorite modern replacement. @hi_bri Thank you for the excellent photos and early help while I was just getting going with these!  

@DC Lavman - Thanks! @Saswatch - NOTE: there are after market hand sets done for the 6117-640x - including the bent GMT, with the bend in the wrong spot vs the originals. The hands are also pretty easy to spot once you know what to look for.  

Wow! amazing write up, and collection.  

It sure is, the 6117-8000 Navigator Timer.  

@Trog7074 thank you, sir! Just confirming.  

yes, as Trog7074 indicated. This reissue is from the classic 6117-8000. I have one of the original ones and it is really nice. Although, I don't travel for business anymore, so it doesn't get much wear.  

@HDelbruk pix needed! lol...very nice.  

Yep, I’ll get some pictures out in a couple hours when I get back to my PC.  

Attachments

@HDelbruk that is in great shape!  

Wow, what a resource this is!  

I will be revising the first thread soon(ish) with (among other things) a the black dial version of the Asian Games. Also of interested to some - I believe all of the 1967 Olympic torch re-editions with red GMT use Radium lume on the hour and minute hands, which indicates to me that that version specifically was likely intended for the US market.  

I've updated the first thread with RADIUM LUME call outs. Namely the 6217-7000 with lumed hands and red GMT from 1967 and the 6117-6019 versions all appear to use Radium Lume. I have many more photos to add in the near(ish) future... I also barred out some 6117-6400/9 versions that I no longer think are original combinations, reducing that list down just a little.  

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seiko velatura yachting timer

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