Odd '58

[Fox Creek Kid]

Local dealer showed me a '58 Rem. he traded for the other day and wanted me to go over. I am somewhat perplexed. It's an Armi San Marco made in the 80's that looks unfired, BUT it has a Colt barrel address!!   

Obviously, this was done post manufacture, but why a Colt address? 

[Books OToole]

It may have been a stamping mistake at the factory.  My Grandfather once had a vehicle with Chevy markings on one side and GMC on the other.

Books

[Fox Creek Kid]

Could be. I took it back to the new owner all oiled up and cleaned. Oh well.

[Flint]

A possibility that someone took a Colt 2nd or 3rd gen barrel and threaded it to go into a remington frame, but that would be unlikely to be in 44 caliber....  ASM is a bit unpredictable, and may have been a mis-stamp, although it's hard to believe the parts maker could confuse the gun design that thoroughly.

[Hambone Dave]

All the speculations make sense but I am the only one that came up with the true explaination.
I believe it was one of the rarest 58's ever made...a prototype. Rem and Colt were secretly planning a merger thus producing a prototype to unveil at the 1869 SHOT show. Alas the merger plans fizzled and the two firms continued on their own design paths.

[Flint]

Armi San Marcos was not around in 1869.....