I bought this on action in Stockholm, and there where no Box, Operation Instruction book or Service card.
It has a Calibre 3313 from what I can tell.
Is there a way to find out from what year it is? So I can find the missing box and book.

 

Can you post the serial number? If it's like my SMPc, it should be written extremely small on the bottom of one of the corners of the watch near the spring bar holder. If you have bad eyes, use a magnifying class. Like I said, it's literally so small that you can't read it.

 

It is under the 7 o'clock lug.

 

I found this snr.78322907.

 

Contact OMEGA here and ask them for the date of manufacturer or wait for Al Archer (forum member and OMEGA watchmaker).