Early Type 38 short rifle questions.

[K98kG43]

Hello everybody. Just picked this up at the local gun show. It's an earlier one pre-WW1? Someone duffle cut it, shellaced the stock and put a mark on the mum but otherwise pretty nice shape. Question I had was once I stripped it down, everything seemed to match until I saw that some of the arsenal numbers are 2 digits apart. Same symbol, so it makes me think it would be hard to piece together like that later. Has anybody ran onto this before? Early Jap rifles are new to me so not sure what is going on. Thanks, Carl.