This pistol is part of the Mauser pocket pistol series which also included a 1910 and 1934 model. The Model 1914 is a 7.65 caliber (.32 ACP) pistol with an 8 round magazine. These fairly common sidearms were produced by Mauser between 1914 and 1945.
This pistol was most likely produced by German arms manufacturer Mauser for Nazi soldiers during World War II. According to the affixed tag, the pistol was picked up by the donor in Germany in April 1945.