Vintage Large Shell Identification

#1

Hello everyone,

I have been scouring the internet to find a place that could help me out with this. I received this from my grandfather, and have been trying to identify what this shell is and if it would be worth anything.

Thanks!

I also don’t have the ability to post more than one picture, but the inside of the cap says:
A16-13-25
SuperCast

#2

Howdy Uric,
A side on picture would also help as well as some dimensions (diameter, overall length), does it have a copper drive band near the base? Have you taken the wood base off to see if any markings under there?
More info the better please.
Regards Ozzi.

#3

Uric, do the top and bottom unscrew? If so can you show images in disassembled condition with angled shots of the nose and base section?