It wouldn't surprise me. Type 24's were produced in China by 1935. All that European influence including the transfer of machine tools and technicians most certainly included teaching the records-keeping, marking, and testing methodology in common use in Germany at the time. That methodology already known at the arsenals could have carried over to when SKS production began.
Another possibility is that Russian influence of their QC stamp methodology is in play here and common letters to Cyrillic and Roman alphabets are what turns up from time to time. There are still certain Cyrillic only letters in many early receiver stamps that I've seen though.
