1968 Omega Chronostop Caliber 865 (Ref. 145.009)

Omega Chronostop Feature

If it is not yet clear that I have an affinity for odd watches, this most recent one will certainly solidify that sentiment. While working on such odd pieces does have one significant drawback (parts) they provide a unique restoration experience and I am always trying to look for my next one. This Omega Chronostop was on my list for a while. It’s not particularly expensive, but a one-minute register (one would have a hard time really calling this a chronograph) from Omega just seemed and looked so odd that I had to work on one. Starting in the late 60s it is estimated that about 124,000 of this caliber were made. It was a very short-lived production, the likes of which have never really been seen again.

After a good search I found this great piece. The near perfect blue dial is what brought me to it. The deep blue color with and orange minute register against the stainless really makes this watch pop on the wrist. I knew immediately that there were a few things wrong but correctable on this watch. Firstly, the movement ring was wrong which caused the movement to move a bit in the case. Then there was the issue of the pusher. A prior watchmaker had substituted the plain button pusher for a women’s omega crown, which beyond looking awkward, functionally wasn’t perfect. And finally and not uncommonly, the crystal while original was scratched up. With these external parts ordered I got to the guts. This movement adapted a Lemania movement for a simple one-minute register. It is a great watch for anyone wanting to ease into the mechanics of the chronograph. The drastically simplified chrono-works make this a walk in the park compared to that Tissot Navigator I did a few months ago or a Valjoux 22, 23, 7750, etc.

Once the movement was cleaned, inspected, and reassembled (and after I got past the always-mesmerizing color of vintage Omega movements), I set about getting the case right. The pusher issue turned out to be a bit worse than I had imagined. In addition to the crown, the tube was not right and was over-tightened into the hole in the case. Furthermore it was installed with an improper tool that left a scar on the case. This required a bit of elbow grease and a file to pry loose but once done, the brand new tube and pusher installed like a charm. After putting in a new genuine crystal I got the movement in with the new ring and it is back to its former glory.

Omega Chronostop Crowns Omega Chronostop Crystal Omega Chronostop Movement 1

While one very much like this but with a date (but in less great cosmetic condition) sold for almost $1500 http://gearpatrol.com/2014/08/19/timekeeping-selects-omega-chronostop/ finding great examples at far less is most certainly achievable for anyone interested in owning such a great head-turning, and unique piece of Omega history.

Omega Chronostop Flat Omega Chronostop Back

Omega Chronostop Movement 2Omega Chronostop CU Omega Chronostop CD Omega Chronostop Angle Right Omega Chronostop Angle Left


1942 Bulova One-Button Chronograph Caliber 10AH

When it comes to chronographs, I am unable to think of a single personal instance in which I have needed the function for more than one minute. Clearly the chronograph is not the most useful of complications, but that does not temper my (or the world’s) fascination with them. Until very recently the invention of the chronograph was attributed to Nicolas Rieussec. It was presented to King Louis XVIII in 1821 as a way to time how long the horse races lasted. This year credit was called into question when ancestors of Louis Moinet presented an extraordinary chronograph that is believed to be from 1816. It is definitely a piece worth looking up.

This Bulova One-Button has been on my restore wish list forever. Recently I was lucky enough to snag two of them and this was the first one I got to restore.

This incredibly rare 1942 “One-Button” is a wonderful and elegantly understated chronograph distinguished by its unusual button found on the crown. One can easily pass by this watch thinking it to be time only, but a second glance reveals both a sub-dial second hand and a sweep-second hand. The latter is a sixty-second register controlled by the chronograph gears. It includes a start/stop/reset function all engaged by pressing the button protruding from the crown. This is one of the smallest mechanical production chronographs ever made, and certainly one of the more rare Bulova pieces.

Bulova made this 10AH movement by taking a standard movement and modifying it to add the one-minute recorder. This method of fabrication is both a blessing and a curse when it comes to restoration. If something is wrong with the main works then it is very easy to find replacement parts, but if something is wrong with any of the unique chronograph parts it is near impossible to find replacements (this particular watch had a combination of both.)

I got this watch with a cloudy scratched crystal and in non-running condition. I was incredibly pleased to find that underneath the crystal the dial was in amazing original condition and had not been refinished. A great way to roughly determine a redial is to look very closely at the small numerals. Re-dialers can do amazing things, but even the best ones are often unable to perfectly replicate the fine details of the smallest numbers such as their specific shapes or alignment. This is just one reason that re-dials just never look the same. Look at the two pictures below for a great recent example. The picture on the left is the original dial and the one on the right has been redialed. You will see a world of difference, and a major reason that the refinished watch just sold for considerably less than a full original should.

Bulova 10AH original dial Bulova 10AH Redial

After disassembly I found two major problems: a horribly disfigured hairspring and broken teeth on the cannon pinion (the piece that carries the minute hand.) The first problem was easily solved by going into my parts stock and digging up a “harvester movement” with an interchangeable balance complete. The second problem required a special and discontinued part that I could only find in the UK.

With all the new parts installed, a case polishing, and a new crystal this over 70 year-old watch is back up and running beautifully. It’s always incredibly satisfying to put the balance in and see a watch come to life but it is even more exhilarating to push a button from 1942 and watch a chronograph spring into action.

Bulova 10AH Feature Bulova 10AH Crown Bulova 10AH Movement Bulova 10AH Side