Finding a properly-marked M1911 barrel in .455 can be a daunting adventure - though it can be done.
I'd gotten a half-dozen or so, from a Brit, back when I was doing restorations - but they're all residing in their respective M1911s now.
Used to be, any of those Contract pistols weren't of much interest to American collectors - but that's not the case, today.
W1006XX went in a shipment of 200 to the British Ministry of Shipping on August 7, 1918.
W1035XX went in a shipment of 400 to the British Ministry of Shipping on August 21, 1918.
Both were originally .455.
Vaya,
Scouts Out!