A note on those date codes. I have a 16-16-8x58R drilling which carries a 2.07 code. It is obviously a pre-1912 gun as the rifle barrel is marked by gauge rather than caliber, ie 172.28/59. All barrels are marked Krupp & are nitro proofed. A chamber cast showed proper dimensions for the 8x58R Sauer round so I suppose the chamber neck is actually 1 mm long. I forget what actual bore measures, should be between .300 & .310 (156.14) but the groove diameter is .321",

Miller/TN
I Didn't Say Everything I Said, Yogi Berra