Can anybody ID? Brass case, steel base. Upon close inspection there seems to be wire inside the buckshot load, i guess it might be connecting the pellets to tighten the group upon impact. Was this some kind of experimental round? Is there any considerable value to it?
Shell (projectile) - Wikipedia
Cartridge (firearms) - Wikipedia
The Battle of France: Guns of Allied & Axis Troops
Punt gun shell - General Ammunition Discussion - International
Sold at Auction: INERT WW1 Italian 65mm Mountain Gun Shell Case
Alternative to high-power rifle ammo is now legal for hunting in
Vickers machine gun - Wikipedia
French Trench Art Vases, 75mm Field Gun Shell Vases 1916
French Shot Sizes - General Ammunition Discussion - International
World War 1 History: Germany Declares Shotgun Inhumane - Owlcation
Bullets calibre gun hi-res stock photography and images - Alamy
Interesting French metallic shotgun shell - General Ammunition