Yesterday I purchased this 1903. It's an RIA SN# 287625. Although I've owned a number of guns in my life, very few of them were old when I purchased them (although some would be considered old now :) ). When I disassembled it for 'inspection' I found that the interior of the stock, in the receiver area, had been coated with a black wax-like substance. Any thoughts on what this might be, why it was done and whether it is/was a common practice?
Also, directions to information that identifies the various marks found on a piece like this would be appreciated.