Omega cosmic moonphase

by joseph kal

hi,

Omega cosmic moonphase watch has 3 pushers that operate the day, month & moonphase.

Could you please tell me about an omega watch I have. It is the movement and dial only. it runs very well.

The markings on the movement are as follows.



1. Omega 420

2. 17 jewel

3. Serial number # 12691726

4. Omega watch co swiss



I am trying to find out if this is the correct movement for the 1951 square version.

the serial number dates it to 1951. but thats all I can find out.

A watch maker told us this was quite a rare movement and watch itself.



Any help would be much appreciated.



best regards,



joe kal.

Comments for Omega cosmic moonphase

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Are you sure its a calibre 420 ?
by: OWEx

The 420 is a time only movement and no moonphase functions. If your cosmic is the square moonphase then its likely a reference 3944 which should house a 381 movement. Sounds to me like your watch might not be all original.

MOONPHASE
by: Anonymous

YES IT IS THE SQUARE FACE AND IT IS DATED TO 1951 OFF THE SERIAL NUMBER.

Then someone used parts from another movement
by: OWEx

inside your watch. It should be a 381 and not a 420.

It would seem someone used parts from a calibre 420
by: OWEx

to replace missing parts on your movement, which should be a 381. This has significant implications regarding value.

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