Do the years pictured here this make it a Kar98a, rather than the Kar98?
Yes and no. the original Kar98 was was dropped in 1905 but after the war they were all renamed either Kar98a or Kar98b. Yours being a 1916 was either an A or an AZ. After the war the Treaty Of Versaille allowed the Germans to keep something like 18000 Kar98's in service and all of these have the 1920 stamp on them. A lot of these rifles stayed in service through WW2!
BTW, Neato rifle.
