Recently bougth an omega seamaster ref. 135.0011 with Geneve Blue dial with movement cal. 601.

After some comparison with my other omega seamaster ref. 135.011 and 136.011 i noted that the caseback have the logo embossed and not sligtly engraved like the other same models I have.

I done some researches on internet but no trace for this reference of another caseback with logo embossed.

I want to ask to the most expert users, opinion about this case. Is fake of legit?

Thanks to all.

Here the picture of the watch: