Johnny, that certainly must be an I on the Colt 1911A1. What would be the mark and its meaning in the top angle above the 4?

Tom, the only date code marks other than F (always under the op rod on the chamber) that I myself have seen on Lend Lease era Garands are the K and L and all have been on the muzzle. I have seen some L codes that are very clearly L but I've seen some that looked as if the L were scrunched to almost form a V leaning to its right. I hope that description makes sense.

Has anyone seen a London proofed Lend Lease era Garandicon stamped on the muzzle? I have seen London proofs on Garand muzzles that are outside of the Lend Lease period but very few of those.