I was hoping that there might be some Centenary experts that could give their thoughts on this one. The movement looks like a 331 to me and I think that the serial number is correct for a 331? Any thoughts? I was wondering in particular about the engraving on the back? I think the 30.10 JUB had the engraving on the back but I’ve never seen one and I’m not sure it looks correct (looks a little amateurish?) Any help from the experts would be great.
Here are some threads you may want to look at: https://omegaforums.net/threads/chasing-classic-centenarys.17501/#post-189041 https://omegaforums.net/threads/centenary-2500-jub-serial-numbers.12752/page-6#post-149286 https://omegaforums.net/threads/older-cousin-the-c-club-continued.7837/#post-92561
Some JUBs had the engraving, other not. Not the best pics, but looks like a nice one to me. Let me know if you pass on it.... Good luck.