Question on a Spanish pistol
looks like a S&W the only markings are as follows
32/20 US Service CTGS on the side of the barrell,
Garataenitua & Cia (ESPANA) on top of the barrell,
SN # 477XX on the bottom of grip frame,
924 inside the cylinder latch hinge and under the ejector.
It belongs to a co-worker and he is interested in when it was built and is ammo available for the pistol.