Type IV British military contract pistol for SOE mounted in SOE belt remote firing rig.
The pistol use is a Colt model 1903 pocket hammerless.
SOE design with belt and cable firing device .Probably made by the SoHo gunmakers J. Wilkes (who did a lot of work for SOE) to a design by Col. John Dolphin, the Commanding Officer of Station IX and a gifted engineer, and Eric Norman, a gun designer working at Station IX.
https://royalarmouries.org/collection/object/object-273789
Royal Armouries: [11:45] https://youtu.be/tmRjbVNFaXw?si=
Still classier than the alternative way of hip firing.
that guy is now castrated