Type 99 Arisaka Serial Numbers
Nagoya Rikugun Zoheisho Arsenal
Hello ARG:The rifle serial number is stamped on all Arisakas ( T-30 to 99 ) on the left receiver wall along with the arsenal logo and production proofs. Il signore degli anelli la terza era. ARG:Actually the T-30 and early 38 system of marking everything was an old system of manufacture when people took pride in what they built. By the time of the last ditch T-99 only the bolt components and the receiver were serialized, all other interior parts were blank. That shows the same hurry and slipshod manufacture as the late German rifles.Note that this is most noticeable among the loosers of WW2, but you can see less markings even in the US M-1 Garand parts.
Type 99 Arisaka Serial Numbers Diagram
The USA says that it was no longer necessary as they had achieved commonality in mass production.