78360 clasp code

[polarinda]

Hi, thought the guys in the Vintage section will know more.


I just got this bracelet from a dealer. The numbers "78360" and "580" are stamped on first links and end links respectively.

However,the clasp is stamped "VB", "registered swiss made", "steelinox" only, without the number"78360".

From my research, I deduce this is from a 1977 model. However, why wasn't "78360" stamped on the inside of the clasp as well?? Was this intentional?

Is this clasp/bracelet genuine?

Any info will be appreciated.

thanks