Drew, that ilustration is not unlike a Wm. Moore gun that I had through my hands a few years ago with the crude side lever opening. The one I had did have Birmingham black powder proof marks. Maybe made in Birmingham or imported to this country where it would require proof. It was in a sorry state and of very poor quality and I de-activated it for someone in order that it could be used as a wallpiece.
Genuine William Moore guns are invariably of a high quality of craftsmanship. Here's hoping Subguage's is of good quality too. Photographs would assist greatly. Thanks. Lagopus.....
