Unusual Shell & Casing

[billy]

Hi my brothers son has this "Round " he cannot identify! any ideas? all Brass weird round with grooves 1-2 degrees but no point, flat tipped 80-85 degrees angle with 37mm length to shell casing? no markings to bottom of shell?

Could this be 1st WW ? any ideas on this would help, he is not interested in selling but I would be interested in how much something like this might cost?

[Phil2M]

Weird, it almost looks home made. Nice to see an unusual item like this.

Phil

[magpie]

Looks like a 20mm x 110 Hispano case with a home made dummy projectile, the case should be 110 mm long.
Andy.