Hey fellas, I was doing some cleaning and organizing of my collection and picked up an US M1840 in attic condition that had been in my possession for around 10 yrs. I bought it because the $ was right and it had initials on the lock reverse side above the lock retainer plate that matched my son's. I was about to slather it with Ballistol and saw what looked like an "&" ampersand C&R mark. Anyone here have a clear "&" so I can reference the fonts to be sure? Anyone have an idea of the Ampersand marks meaning? I know Knott doesn't list one in his book but it's a known entity. Thanks!