Good night guys! I saw this particular model and a doubt went in my mind. First I could not find it's reference in the omegamuseum site and then I searched in the web and could not find an Omega with date on 6 that it doen't say Semaster Calendar. What do you think? Thanks! Solved, thanks!
The pictures are not mine, they were from the ad of the auction I won, but already gave it up. Sorry, the low price blinded me... I started my vintage collection in the end of last year. Now I have an Omega Seamaster Monte-Carlo quartz, a Rado "r-line", an early "curvex" ORIS and a blue Tissot PRS 516 GL.
The OP deleted the pictures of an ugly redial, and also seems like he won an auction and is not paying...