6.5x54R Dutch "37A AI"


I think AI=Artillerie Inrichtingen and 37=1937. What is “A”?


A = lot designation for case production (?), 1937.


Yes, Lot designation, can go up to B,C and D. ( quarters of the Year???)

Doc AV


In some years in the 1920s the letter suffixes can go up to at least H. Jack