1870 introductions

Celluloids are a class of materials produced by mixing nitrocellulose and camphor, often with added dyes and other agents. Once much more common for its use as photographic film before the advent of safer methods, celluloid's common present-day uses are for manufacturing table tennis balls, musical instruments, combs, office equipment, fountain pen bodies, and guitar picks.

fictional submarine in Jules Verne's stories

crown made in 1870

black-powder center-fire metallic revolver cartridge

thumb|1917 and 1939 MPL-50 models. Note that the 1917 model has a double-headed eagle. thumb|Post-World War II|WWII design. The blade cover to the left allows the MPL-50 to be worn on the belt in a blade-up manner. The MPL-50 (, malaya pekhotnaya lopata-50, small infantry spade-50) is a small spade ( length) invented by Danish officer in 1869. It has been used by rank and file military personnel in the Russian Empire, Soviet Union and its successor states since the late 19th century. While nominally an entrenching tool, the MPL-50 has seen wide-ranging wartime applications, from a close-quarte