The Cartridge was made in Dezhou，Which is 102 years old（1918.7）
The Chinese Character “德州"is different from the same character on the headstamp，After asking my friends，I finally know the Character on headstamp is wrote in"草书”，One of the Chinese ancient fonts，That’s interesting.
Sorry for being pedantic, but as far as I know, in China the caliber was called 7.9, like in Germany.
The designation “7.92” was not yet invented in mid-1918.
Thanks for your correction，the fact is so. It’s called"7.9/七九"in China rather than the wrong name of “7.92”，thank you😁