Is this original? Gold Seamaster 752

I have an old Seamaster which appears to have a solid gold case, but while I have owned it for at least 15 years I know almost nothing about it. The dial is exceptionally clean, but appears to be original (not refinished) and the hands look like they match. I had it serviced about 10 years ago, by a local watchmaker, who could offer no opinion on whether it was all original. A check of the serial number suggests that it's from approx 1968 and I have been able to find similar watches from that era, although subtly different and bearing the COSMIC text in addition to Seamaster.
The crystal does not have the Omega logo, as far as I can see, but the watchmaker confirmed that it is the correct shape to secure the bezel. I have removed the caseback and taken a few photos. Any information would be appreciated.


I am also including a pic of a random dial that has been floating about my parts box for ages - does anyone know what movement this is for? It has short, stubby dial feet at (slightly past) 56 & 26 mins.

This may help with the dial: http://jacktreasure.blogspot.com/2015/03/very-rare-omega-military-seamaster-30.html
This will help with the other: http://naligazone.com/index.php/data-watch/omega/13-watch/omega/727

Thanks for all the responses.


Does that mean that the watch wasn't delivered from Omega in this form, or was the case produced for Omega?

I is an OK Omega. Sadly it has been almost polished to death. Here is what it should look like: