I can only judge by other similar examples(Fuze Marking) that the fuze is made in Mukden Arsenal(Northeast China)，And the production year is 1925 and 1927.
I coulden’t find any infomation about Type of fuze(Unknown Type).The fuze has the same structure as Japanese Type 88 large instantaneous fuze,but the screw thread is different from Type 88.
Anybody can help me？
Japanese Type 88 instantaneous large fuze and Unknown Chinese fuze:
Unknown fuze disassembly:
Japanese instantaneous large fuze disassembly: