A Hotchkiss Case

[Shell Shifter]

6" tall. About 75mm caliber +/-
All brass case.
Thoughts?

 

[Hoeksel]

What is the rim diameter? If you want a positive ID you need to give dimensions that are more precise.

 

[Shell Shifter]

Rim=3.37"
Dia at opening =2.98"

 

[Hoeksel]

I checked my references but I have nothing coming close nor do I remember ever seeing such a shell case.

 

[ThomasP]

Basic Hotchkiss "made-up" case, probably from the late-1800s. Probably US 12pdr. Used a lot for naval ordnance.
This Patent probably applies to the steel case you were asking about as well.