That 1911 is actually a very interesting one. It's part of a Colt made .455 webley chambered 1911 for the Royal Air Force in WWI Circa 1918 or thereabouts. One of about 10k that went overseas. If you squint you can see the right slide marked .455 and the serial number started with a W.

My particular example was refinished in nickel and had the military stamps ground off. No collector value now but it did have the original .455 mag. interesting history though. If it was in original finish with stamps present, it's a $4k+ gun.