Hi
Can someone tell me why this caseback doesnt have no 67 (or 68) stamped on the caseback?
I was looking on the forum but cant find any thread.

 

I believe you have yourself a service back. It’s authentic but not original to the watch.

 

Have you seen any other similar, or same backcase?

 

I would second the service caseback opinion. I have seen similar but, I cannot be certain if they were identical.
Notice the elongated notches on back used to remove the caseback. Much longer than the originals, in addition to the different engravings.

 

I happen to be at a friend, checking out a few things while Omegaforums.net is on his computer... so we couldn't help to check his large collection of old & service casebacks and the only similar Hippocamus he has , contains as a last line on the inside 145 0012 SP

 

So nobody has a clue about this strange caseback!

 

.... we already told you it’s a service caseback...

Try searching SP in the forums and you may stumble across a discussion on its meaning. I am not certain it would apply in this case.

A similar one recently sold on eBay:
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/113629266483

 

This is quite different to the OP caseback

 

I dont see any simialrity with my caseback, beside no year inside.
And all 145.012 casebacks have SP inside..
I have found this one on bay:

https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.it/ulk/itm/273760492642

 

I guess “similar” was too strong. Does it remain a service caseback?

I can imagine some backs didn’t get stamped with a date, but have a hard time imagining they found their way on to a watch leaving the factory.

@Igora You could always shoot the seller a message on the piece you found and see if he has any info on the back?