Not to detract from this thread. Here is a W&S 10ga gun with Chicago gunmaker, Joseph Bulter's name on it and using a Purdey thumb opener. Joseph Butler, born in England, had been in business with James Golcher, also born in England, in Philadelphia. Butler moved to Chicago about the same time that William Golcher moved to St. Paul.

http://www.cabelas.com/cabelas/en/conten...oryId=SEARCH_gl

Cabela's also has W&S 720 20ga.
http://www.cabelas.com/cabelas/en/conten...oryId=SEARCH_gl

Pete