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Opened July 1999, zOwie is the Internet's first and longest running discussion forum dedicated to Omega brand watches.

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Here's some ....
In Response To: Looking for info on my chronostop ()

Hi Niel,

The 920 movement was introduced in 1968. I have no idea how long Chronostops were made, but I have an owners manual from 1972 ( came with my Speedy MK II ), which covers a number of Omega watches including the chronostop features, So I assume they were still available in 1972.

Since you know it is a 920 bracelet & have noted that there are 2 case ref #'s (more on that below), you can get the back off. Get a magnifying glass/loupe & look for an 8 digit number. This number will help you determine an age for the watch.

You can use Chuck Maddox's serialnumber guide to get a rough guess. The table is not exact, but it's a good estimate.

The reason for the rear case cover having 2 different case Ref #'s is that the 146.009 is the "on top of the Wrsit" ( = normal) version & the 146.010 is the "under the wrist" ( = driver ) version. They both used the same case, rear cover, hands & movement.

Finally here's a link to a Small web-page that I wrote on Chronostops>/A>

I hope this helps

Steve

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