I was given a Stevens Model 94 single at age 13 -- hoping to move up to a 311 someday. The Model 94 now has the "slackum" finish discussed on this board -- no kidding. Had to try it on something. Maybe the difference between American production doubles and the Birmingham boxlocks is that the Americans had to compete pricewise with very good repeaters, plus they were more creative than simply building the same Anson and Deeley gun with parts all sourced from the same place. In a way this has made the American double collecting world a lot more interesting.