Have had these two for years and don’t know what they are. The larger one is 3” and the smaller one is 2-1/4” across and they have no markings or numbers. Any help is appreciated. 

Looks like the 3” ( or larger bore) and 75mm M1907 shrapnel fuzes. Not engraved because they were factory rejects ( failed dimensional inspections) or less likely training aids. I have a 75mm M1907 in as issued condition for comparison. They were issued loaded with a brass “ cap” covering the fuze. 

22 hours ago, 917601 said:

Looks like the 3” ( or larger bore) and 75mm M1907 shrapnel fuzes. Not engraved because they were factory rejects ( failed dimensional inspections) or less likely training aids. I have a 75mm M1907 in as issued condition for comparison. They were issued loaded with a brass “ cap” covering the fuze. 

I appreciate the information.   Thanks!