I was gonna post this a bit ago prior to Ron's but I think it applies from what I know.

This could be an early "backdoor" knife, built perhaps by/for an employee? Maybe it was a project knife of an employee with permission from Bo. Maybe it was made for a "spook" during the Viet Nam war. I could come up with allot of maybes. Really hard to say. I don't think it a "kit" knife as it would/should have the RMK logo stamp.

The blade is a later blade grind, as early as the mid 60's, but that is where it ends. From the hilt back, it is in appearance at least, as early as the 50's and even late 40's in some respects. The blade will carry the day though for dating purposes.

All we can go on though is as it stands from memory of past employees, shop records, and Randall family members, is that every authorized blade to come out of the RMK shop since sometime mid/late 1939 should have had a logo stamp.

This one does appear to be an exception. Definitely an interesting study.