Faked markings IMO
M5/52 : "M" .... = Metal parts...
should be "L" .....
The marks are all quite incorrect. Do look in the SS equipment thread done by Dimas. Also Dr. CHM has some clear images of the proper marks for an SS pack.
And I hardly need add, that M5 is the RZM license category for buttons, not leather goods of this type.
L is the leather good category, with its subdivisions. L 2 and L 4 .
See Herstellungsvorschriften der RZM.
Some SS items are VA marked, as well.
SS field gear etc markings
Thanks a lot for the comments!
photo courtesy of Whamond.
I own two of these, but without RZM tags. They have either the VA or the RZM stamps.