cicindela
219
Yes
Thomas, yes, very collectable. Dennis already referred you to Desmond's recent paper. I posted about mine here a short while ago.
omega.watchprosite.com
I have seen the dial with OM at the bottom before on gold dials, it means Or Massif,=solid gold. The gold dials on these came in a flat surface, like yours, and an embossed gold, with the embossing design like my blue one. These are great watches, with the flattest movement ever made by Omega.
Here's is my blue one

PS. If you get this, don't let Dennis anywhere near your watch ^^
Constellation cal. 712
By: tdn.dk : July 2nd, 2011-03:13
Hi! I have the opportunity to purchase this watch , but is unsure whether it is collector worthy. It is from start 70s , ref. 153.0039 , 18k gold and cal. 712. It is very reasonably priced. Appearance wise , I prefer the older Constellations , but I have ...
article
By: ulackfocus : July 2nd, 2011-04:58
Desmond just did an article on the 71x series - you can download it from this link: omega-constellation-collectors.blogspot.com Something looks strange about the bottom half of that dial, like the fonts are wrong. As a fan of vintage ultra-thin calibers, ...
Thanks....
By: tdn.dk : July 2nd, 2011-05:13
I have read what i could find about Constellation and cal. 7xx incl. Desmonds. About fonts, i think these early 70's Connie's use a different font, but maybee someone will comment on this. I cant find any similar ref. 153.0039 to compare, and it isnt in t...
Yes
By: cicindela : July 2nd, 2011-09:59
Thomas, yes , very collectable. Dennis already referred you to Desmond's recent paper. I posted about mine here a short while ago. omega.watchprosite.com I have seen the dial with OM at the bottom before on gold dials, it means Or Massif ,=solid g...
The database is patchy
By: mondodec : July 2nd, 2011-18:29
on these ultrathins. I have been keeping a register of ones that I encounter in a larger list of calibres and case numbers. click here I notice that I have recorded this model before Thomas. Very attractive piece with a 18k dial. Your example, and indeed ...