Baz, “Shed”,

You are both wrong and both right.

The C1 is a C1.

Vulcan: Vulcan stock, full power spring. Safety.

Victor: as above, but Victor stock, lower power spring. No safety.

C1 (early): C1 stock, full power spring. No safety. 14” barrel.

C1 (late): as above, but safety.

My gut feeling is that most C1s were the early type, and that most of the later type went to the States.