The FN 1910 was build in 9mm short (.380ACP) and in 7,65 browning (.32ACP). It was sold from 1910 till 1983! Belgian foresters had them as side arm till a few years ago. This gun was in the pre-WW2 years the standard gun of the Belgian state police and at a lot off city police forces.
FN (Fabrique Nationale) Logo:
The 1910 in parts (click to enlarge):
Some characteristics:
Caliber: 9mm short (.380auto) or 7,65mm browning (.32acp)
Barrel: 87,5mm long with 6 right fields
Magazine: 7 bullets in 7,65mmm and 6 bullets in 9mmshort
Total length: 153mm
Total height: 100mm
Weight: 7,65mm Browning: 580gr, 9mmshort: 570gr
Muzzle velocity: 7,65mm Browning: 280m/sec, 9mmshort: 260m/sec