The PM hasn't arrived. Post 1968 the letter convention was to be used but I don't think all subscribed. Don't know when or if the Jahreszeichen fully converted back to numerical but after unification I think the Jahreszeichen went back to letter. It may have been an attempt to prevent the easy ID of the year of proof and inject a bit of haze as to how long a sporting weapon had been in the shop. Anyone have a post 2000 with proofmarks? Also remember that I/J are one.

A 0
B 1
C 2
D 3
E 4
F 5
G 6
H 7
I/J 8
k 9

So 10KG must might be for October 1996?

Kind Regards,

Raimey
rse