here's the pics. I suspect that as these chaps were purchased here in british Columbia that the 41BX refers to the old Barbards Express or BX Express as it was known. This was a freight, stagecoach and breifly pony express that ran in british Columbis in the late 1800's and early 1900's.They were involved with the Goldrush and transporting people and materials from Yale BC to the gold feilds. A google of BX Express will give you information on the company.According to the Western Museum in Texas the chaps are typical of unmarked styles that were purchased from the Sears and Montgomery Ward catalogues by cowboys of the day.