Walther TPH
The Walther TP and TPH handguns are extremely compact double-action lightweight semiautomatic pistols in .22 Long Rifle and .25 ACP calibers.
The TP was produced from 1961-1971 and the improved TPH has been produced continuously since 1968. Models have been produced in Germany and (by Interarms) in the US.
Pistols in this size range are sometimes referred to as pocket pistols.
Read more about Walther TPH: Specifications, Walther Bite, Controversy and Issues, Gallery