"7-inch Armstrong Breech-loader." — Encyclopedia Britannica, 1893

Armstrong Breech-loader

"7-inch Armstrong Breech-loader." — Encyclopedia Britannica, 1893

"Early breech-loader. C, pinfire cartridge; S, single grip." — Encyclopedia Britannica, 1893

Breech-loader

"Early breech-loader. C, pinfire cartridge; S, single grip." — Encyclopedia Britannica, 1893

"Central-fire cartridge." — Encyclopedia Britannica, 1893

Cartridge

"Central-fire cartridge." — Encyclopedia Britannica, 1893