Looking at the marks it was originally black powder proofed then re-proofed for nitro under the 1896 1904 Rules at 2 3/4". No reason why they did not have it proofed and in stock for some time before they moved it on through their London outlet. Not unusual for action for guns to be traded between different firms or built under a Royalty system. At that time Tolley were more famous for big bore and wildfowling guns they were later bought out by Skimmin & Wood who made a lot of the little 2" chambered boxlocks you will find with a host of other names on. I have a 2/3" chambered Tolley wildfowl gun made in the early part of the last century with the Birmingham address on and a latter Tolley 2" guns made when they were owned by Skimmin & Wood who would have been entitled to use the Tolley name on their guns. It's an interesting company and guns they sold were generally of a good well made type. Lagopus.....
