Remington UMC 380 pistol

Answer 1

updated answer: The .380 Remington Arms UMC [Union Metallic Cartridge Co] pistol is the semi-automatic centerfire model 51 pocket pistol, also made in .32 in much smaller numbers, with production of the two calibers totaling about 65,000 from 1918 - 1927. The model 51 was designed by famed weapons designer John Pedersen, and all model 51 s/n start with "PA" for "Pedersen Automatic". They are highly regarded for their ease of use (although not ease of disassembling and reassembling).

Primary US competitors were the Savage Arms pocket pistols (models 1907, 1915 and 1917), made 1908-1928, also in .32 and .380, and the Colt pocket pistols.

original answer: Pistol? Semi-auto Model 51. No pistols.