Bill / Bob: Thanks!

Cap: I'm damned near speechless after reading your reply! I typically don't re-hash minutia, but this stamp / no stamp thing is somewhat important if we're going to try and pigeon hole The General's knife to the best of our ability: Now this comes from Jack(nola) as I'm not smart enough to come up with this myself: The introduction of a model/length number stamp on Johnson sheaths occurred several months after the introduction of the baby-dot. This sheath is probably a case of the shop improvising an identification number to ID the sheath before Johnson began using ID stamps. The lack of an actual stamped set of numbers on this sheath still likely dates the sheath very precisely to early-mid 1963, say March-July. That would include the production dates between the introduction of the baby-dot (early-1963) and the introduction of model-length stamped numbers (mid-1963).
The dating of a sheath does not definitely date the accompanying knife, but it gives us circumstantial evidence regarding when Bo presented the knife to him.