I have a Pinfire shotgun built by W & C Scott & Son, 7 Dorset Place, Pall Mall, London.
According to Mr J Crawford of W & C Scott, information service (Dec 1983) this gun was built under the 1863 patent # 2441 of Samuel Mathews, Birmingham. This gun has a top lever with single underbolt. The Scott Spindle was patented in October of 1865, which also used a top lever. Purdey used a thumb push lever with his double underbolt. The most widely used bolting over the years & still in wide use today is I believe the result of the "Marriage" of the Scott Spindle with the Purdey double bolt.
