Note that in the original posting it is stated the gun "WAS" re-proofed. The question concerns the "Sleeve" mark. Anyone know at what point this became a requirement for a sleeved set of bbls.
Perhaps it was sleeved & re-proofed prior to this requirement, or perhaps it was submitted for re-proof with no mention of having been sleeved & as was all Damascus the proofer just failed to notice this fact. Or perhaps he just forgot to place that mark upon it, several possibilities here, may never know for certain.
