According to Bob Elliott's book, about 750 sidecockers were produced. What gauge is the one in your pictures? They are apparently scattered over serial numbers ranging from 5000 to 9242. In other words, not all the serial numbers were used. Batches of serial numbers may have been set aside for licensees, like Chas. Daly. Uncle Dan's sidecocker is the only American gun pictured and discussed in W.W. Greener's "The Gun".

Rich