I believe the 4-line and 1-line refer to the stamping on the front right side of the frame below the cylinder, not on the barrel. The 4-line address allegedly began in the low C3xxxx range. C41622 definitely has a 4-line stamping.
The 1-line address is not really an address - just "MADE IN U.S.A." I suspect that is what you will see.
Last edited by DWalt; 01-27-2020 at 03:38 PM.
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