I was under the impression that Chas. Lancaster guns with a "0" in the prefix were not actually made in the Lancaster factory at 151 New Bond St. Most of these types of guns being "body action" type guns or mid-grade sidelocks. Does anyone here have a good idea of who was contracted or sourced to build these "O" prefix guns for Lancasters? I've noticed that still all of the guns that I've looked at with "0" prefix still bear London proof marks, I've never seen one with Birmingham proofs. Any help, thoughts or good info is of course, greatly appreciated.

Dustin