Is this a ladies Baby Flightmaster.

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Its a beautiful watch, and your name for it seems apropriate. It looks tiny, how big is it?
 
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Nice!

It's not a cal 552 and I'd say it's a 68x calibre which is very similar to the 550 series but at about 2/3 of the size. Great little design.

Cheers, Chris
 
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Nice!

It's not a cal 552 and I'd say it's a 68x calibre which is very similar to the 550 series but at about 2/3 of the size. Great little design.

Cheers, Chris

Zooming into the movement pic, I think it says 684. Excellent workhorse movement in the same vein as the 55x and 75x movements, I have one in my Seamaster 120.

Update: the Omega vintage database says 681 so😵‍💫
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