Bulova Caliber P102

Bulova Caliber P102

Last updated:

Bulova Caliber P102

Manufacturer Bulova
Caliber Number P102 (P102.10, P102.12)
Dimensions 12.5”’ (about 27mm)
Battery Number
CR2016 (3V)
Jewels 8
Functions Hours, minutes, sweeping central seconds, date
Country of Manufacture Japan
Known Models
Champlain Precisionist

This is considered one of the most accurate quartz movements in the world.

There appear to be several versions of the Bulova caliber P102 including the P102.10 and the P102.12. Supposedly there is a ladies watch version of this movement which is caliber P112.10, so perhaps people are just mixing them up. If you know anything about the differences between these variations, please comment below.

It takes a CR2016 size battery which is almost as big in diameter (20mm) as the movement itself (about 27mm).

From Bulova:

Most quartz watches are accurate to within 15 seconds per month… Precisionist is accurate to within 10 seconds per year.

The innovative Precisionist crystal has three prongs, creating a torsional resonator – the prongs not only move back and forth, but twist. Standard quartz crystals have only two prongs.

Precisionist has the highest number of vibrations (262.144kHz) of any quartz watch. This unique construction generates 8 times more vibrations than traditional quartz. The result? A reduction in the effect of temperature variation and superior accuracy.

From Ricky Mac on Amazon:

Now, I won’t pretend to be Electronic Engineer enough to fully understand the nuts & bolts of it. I can say with confidence that the Caliber P102 is a 12 ligne (27mm) round movement with 8 jewels, and is marked “BULOVA / EIGHT JEWELS / JAPAN”. Beyond that, it’s my understanding (But don’t quote me, please) that Bulova achieved both the 16 Hz sweep and the ± 10 sec/year accuracy by the brute-force expedient of running a 262,144 Hz oscillator crystal. But even though this is eight times that of a normal quartz crystal’s 32,768 Hz, the sweep requires one further gimmick. Rather than being a 2-pole design like conventional crystals (in effect an A/B switch), the proprietary crystals add a third pole – effectively an A/B/C switch.

The downside of this is, of course, increased battery draw. The caliber P102 uses a 3.0V CR2016 Lithium coin cell and, while these can last up to 10 years in conventional movements, Bulova rates it at 2 or 3 years in this application. Depending on who you listen to. I’m actually not certain that Bulova has stated an Official battery life spec, but the 2-year figure seems to be a realistic expectation given other owner’s results.

Is it worth it? HECK yeah! At a glance, you can easily take the sweep as being truly step-less à la Seiko Spring Drive. If you look really close you can discern the 16 Hz steps, but you may have to use a loupe to do so. In any case, it’s mesmerizing to watch, and far, far smoother than any high-beat mechanical, even the 36,000 A/h über-mechanicals. When you consider that a watch with active illumination is also capable of burning through a CR2016 in a couple of years, it’s a more than acceptable trade-off, at least IMHO.

Review by Horochron on bdwf.com:

This model, as in all the men’s versions, uses the quartz Precisionist Bulova caliber P102.10 (12½ ligne) movement, which so far lives up to its accuracy publicity.

Review from ablogtowatch.com:

…Inside all the current Precisionist watches are the Japanese made Bulova caliber P102.12 or P112.10 quartz movements. As far as I know those are the only two Precisionist movements available right now. Bulova is owned by Citizen (Japanese) at this time, but used to be US owned. The movement offers three major desirable features. First and most importantly is the accuracy. The watch is accurate to about plus/minus 10 seconds a year. That is in comparison to about 15 seconds a month for standard quartz movements. It is also comparable to much higher-end Japanese and Swiss thermocompensated quartz movements. Second, the watch has a smooth sweeping seconds hand. It is smooth like the seconds hand on a Seiko Spring Drive, and more smooth that the seconds hand on most mechanical watches. Third, it has an acceptable battery life rated at between 2-3 years per power cell.

…The P102.12 movement operates at 262,144 Hertz. That is really fast and accounts for the accuracy. In comparison, a standard quartz movement operates at 32,768 Hertz, and a mechanical movement operating at 28,800 bph is only running at 4 Hertz.

Review from watchreviewsbymcv:

Sweeping away inside this Precisionist is the new Caliber P102.10 quartz movement.  I refer to this movement as HEQ (high-end quartz) for two reasons.  One being that the MSRP of this watch is $500 USD, which is a lot for a quartz watch.  Second, since this watch exhibits a greater degree of accuracy than typical quartz movements, it more or less earns HEQ status.  You could also refer to it as ‘high accuracy quartz.’

…In brief, Bulova’s design takes into account temperature changes and vibration frequency of the quartz movement by adding a third prong to the quartz crystal.  This design increases the total vibrations to eight times that of a standard quartz movement, with the Precisionist running at 242.144 Khz.  The result is the sweeping second hand that actually ticks 16 times per second, even higher than a mechanical movement’s 8 to 10 times per second.

Buy the Buloval Precisionist watch

Bulova Caliber P102.10

Video:

16
Leave a Reply

avatar
  Subscribe  
newest oldest most voted
Notify of
Hubert
Guest
Hubert

A lot of movement for the money! The only quartz that I know of that looks like an Automatic sweep seconds hand.

The Accuholic
Guest
The Accuholic

I just stumbled onto your site.The watch I’m wearing is omega megasonic.prety damn smooth and almost 50yrs old.I own hundreds of bulova watches made starting in 1960(but used in space before that)calle d an Accutron.It sweeps better than any mechanical watch of its day.I also have a bulova accuquartz(Beta 21)and 3 omega beta 21’s all which can hold their own w/the japanese today.These were probably made before you were born.There are others but I don’t want to preach.Just would like to open your eyes to good things past by.A friend has a site called crazywatches.pl and rob at accutronplace who… Read more »

Bob Barkell
Guest
Bob Barkell

take a peek at the Seiko 5S21 calibre in a 36mm case, they released a ‘doctors’ watch with smooth sweep

Pedro
Guest
Pedro

where can i purchase this movement?

johnnyjohnny
Guest
johnnyjohnny

yoWza yoWza!!! i have tried to wear quartz watches and simply given up in disgust with the cheap halting tick of the second hand, even on $1000+ luxury watches, looking like a hong kong knockoff. as both a vintage watch seller and enthusiast i thus have always loved the classic mechanical or auto movements such as the eta’s, valjoux’s, even arcane ww2 military mechanicals including german luftwaffe watches. these bulovas are pure game changers…and changers of purist mindsets (such as myself). as others have said, watching the beautiful sweep of the second hand on these is indeed mesmerizing…especially in the… Read more »

stephen
Guest
stephen

i have the bulova 96b131 precisionist and i love it. the look, the feel and especially the sweep of the second hand. dont forget price very resonable im very happy.

Watchnoob
Guest
Watchnoob

Does Bulova themselves make this movement?

johnnyjohnny
Guest
johnnyjohnny

bulova is owned by citizen watch, so that ultimately who makes it. it is only used in the bulova accutron II watches, so it is proprietary to that brand and model.

accuholic
Guest
accuholic

I just recently found this sight and recieved EM.I could not find this forum on main page.I am an old,old man who mainly collects electro/mech watches from “50’s thru 70’s.My collection stops when sec hand ticked. Omega 1310.Omega made a choice to produce “A”Q rather than go w/choice “b”which based on the accuquartz.Although I have several hundred watches that are outside this frame work,I have never sold a watch.I’ve given many away.I have some very accurate Watches.Omega made some that are close to the new watches coming out today.My bulova accuquartz (Beta 21)still hangs in there.Omega marine Q-15**models,the 1310 are… Read more »

accuholic
Guest
accuholic

I guess I am older than I thought.I found my own post above that I never remembered posting.Sorry about this,and await my dirtnap humbled.

Oki
Guest
Oki

My precisionist was advertised at about 8 seconds a year. I could tolerate several seconds deviation but this one deviated about several minutes a year finally i sent it to a bulova service center and somehow they regulated it to nearly perfect accuracy. Currently, in several months it has not lost or gainen one discernable second. So im happy, except i wonder why the manufacturing inspectors let this watch out in thevshape it was in.

Lemon
Guest
Lemon

As fanatic as some watch fanatics can be, some fanatics just don’t realize that a watch can ship from the manufacturer or store in perfect timekeeping synchronization to the atomic clock, but so many things can happen from the moment it leaves their doorstep. The shipping carrier can be too hard on the package, the watch can get magnetized, or the user just doesn’t know how to use it or care for it correctly. It doesn’t mean it was a faulty movement or defective watch, and it doesn’t mean the QC inspectors failed at QC.

Oscar
Guest
Oscar

I need parts of this caliber. Can someone tell me if it’s a Citizen machine? or where can I get the full machine?

trackback

[…] here… Sorry what I should have said is that it is as accurate as the thermoregulated movements.Bulova Caliber P102 Watch Movement | CaliberCorner.com Reply With […]

Instagram Feed Instagram Feed Instagram Feed Instagram Feed Instagram Feed Instagram Feed