That looks a lot like the Colt 1917 revolver (or S&W) or British variant .455?...without the
essential (for
aerial combat?) lanyard ring!!! how
could you!

Actually made back in 1909 and adopted by the (
pragmatic) marines to cover a shortage of .45 autos: one of my fellow security officers
still carries ONE! with the increasingly rare
Half-moon clips for
ACP rounds...what A CANNON

I carried the Trooper 8" .357 variant with
shrouded ejector for 2 decades (alarm-agent and truckcab sleeper) before upgrading to the Python. Nuthin' good goes outta style BBY!

Just for fun-note
big time lanyard
even on the
ground!
Rigging is
essential in WWI...even for pilots to their guns!