I'm adding this photo (just because) its another interesting make of top break - A WEBLEY MK IV, Originally a birds head frame & chambered in .455 caliber. I bought it from a small dealer in Maine, who specialized in British Surplus arms - years ago.
It was very cheap owing to the fact it arrived in a drum full of police confiscations. I took it on as a project, because it had some issues, & was the only late MK IV I could afford. The Frames Grip Strap had been CUT & bent forward to make it easier to conceal - Then Wrapped with lots of cloth electricians tape. The section where the lanyard had been - was gone.
I was able to re-weld it - into a more Bisley looking shape, & made walnut grips for it. I saw that its cylinder was shaved down for .45 acp & moon clips - but when loaded it wouldn't close, So I had to turn it down a bit more. I was pleased that it was otherwise in fine working mechanical condition. As Webleys became more valuable - I finally sold it, + my two Mk VI's to up-grade my arsenal. Imagine my surprise, when I found, & recognized this picture of it - FOR SALE again.
A rather chunky, heavy pocket pistol - with a history.