These are old 410 gauge paper shotgun shells from various manufacturers including Winchester and Remington which are chosen at random.
1950's 410 Shotgun Shells and Boxes - General Ammunition Discussion - International Ammunition Association Web Forum
Western Fictioneers: Shotgun Shells by Gordon L. Rottman
45 Colt/.410 Bore Handguns Versus Non-NFA Shotguns
Vintage .410 paper shells
Maximizing .410 Shotgun Performance for Hunting and Defense
Paper case shotgun cartridge hi-res stock photography and images - Alamy
410 bore - Wikipedia
410 Bore Blue Empty Used Shotgun Shells –
Paper Shotgun Shells and Old Boxes, Tools, Furniture, Antiques, Collectibles, Estate
What was the old blue shotgun shell called? - Quora