Dustin,more research may be needed here. Beesley's shop was very small and capable of producing only small numbers of guns each year. Looking at the records in Brown's book show years where sales were below 50 and even 30 guns. But he was known for licensing his patents to others. Judging from the number of wrist breakers we see on the market today there must of been a considerable amount made and sold back then.So I can't see Beesley being the source for Lancaster's O grade guns. There must be other clues.