Looks to be a set of JY stamps in addition to the K in a rhombus. Also, there just from the images which can be deceiving, 2 Kelber script L type stamps with one over the Crown over G on the lower rifled tube, when the light is just right.



I think the date to be 339, not 330, and for the moment I cannot work the 72 ledger number into the mix. Seems all the mechanics marks are from Suhl but I cannot see the scattergun tubes Nitro marks.


Supplemental Proof table