Googling the ref number doesn't give any similar watch. This by itself is strange. Caseback should have engraving. I guess somebody put that dial in a normal Seamaster case? http://www.ebay.ch/itm/OMEGA-1950-R...C-MANUFAKTUR-KAL-351-SAMMLERUHR-/371148282304Purchases made through these links may earn this site a commission from the eBay Partner Network