FYIs:
1. Colt never used a roll stamp like the one on the grip frame bottom for USMC CNSs.
2. The side plate roll stamp is correct for a 1906 made gun but not for a USMC one.
Kinda silly to fake something that doesn't match a real one eh ?
The rarest 100% correct CNS in any "stock configuration" could bring 5 grand on a good day. Hardly comparable to a Singer 1911, more like a Remington Rand one.
G&H no longer provides the service so the mystery remains.
Sent a note to Mullin, hope he has some thoughts.