I have this 12 bore that is a rather smooth self opener. It has 28" barrels and weighs a surprising, to me, 5# 15 oz. Bores still perfect at .729". Gun was made between 1954-1961 when the firm closed in Birmingham. Edwin Smith was an actioner and gun maker from 1914 to closing. Serial #276. Can anyone identify the self opening system ?

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

Last edited by Daryl Hallquist; 12/30/23 06:54 AM.