zOwie Omega Discussion Forum

: Congratulations on the new watch.

: Omega watches have the serial number in two locations, one interior
: and one exterior, small and even smaller, respectively.

: During the era in which the calibre 2500 has been used, the
: exterior serial number is most commonly laser engraved on the
: lug closest to 7 o'clock (and is so small as to be difficult to
: counterfeit as well as difficult to read without magnification).
: There is as well an interior one on the movement which is more
: readable.

: Gray market watches frequently have the exterior serial number
: removed. Older Speedmaster models with calibre 1151 (for
: instance) that came with a press in (rather than screwed in)
: caseback had an exterior serial number engraved on the rear of
: the caseback in a larger font.

: Some of the most popular (and most faked) models also have a
: complex laser engraving of a stylized Omega logo on the outer
: edge of the caseback. I do not know if the Deville model you
: have includes it.

: Hope this helps

Many thanks Hewybaby for your informative and helpful reply.

I found the serial number on the 7 o'clock lug exactly as you described, and I could read it with a magnifying glass. When I saw it I wondered how I had missed finding it. And of course I was very happy to see it still intact.

The back of the case is a clear crystal window in a steel ring. The ring has five indentations so it can be unscrewed using a special tool, and the only engraving I can find on the ring is "CO-AXIAL ESCAPEMENT"

The watch is absolutely beautiful inside and out. I didn't know about the transparent back until it arrived. It's fascinating to see it in motion, truly a masterpiece. I love it.

Thanks again for your help.

Best regards,

Grandtiger