I don't own a Clawson's book so I am hoping someone can help me with this one. I believe the correct magazine for this gun should have C-R, C-L, or C-S stamped on the magazine bottom plate. One any of this magazines be more correct for this gun? Were all three of these manufactures making these magazines for Colt in 1943? Is any one of these magazines more desirable or collectable than the other? Thanks in advance.