Dear Daryl,
Thank you for the additional photographs. Looking at the one with the extractor removed I believe that I can see diagonal lines of the joint between the lump and the barrels on either side of the extractor rod hole and guide hole.
If it was a conventional dovetail lump then I would expect the joint lines to angle back towards the barrel flats and the lumps themselves.
If it is a form of clip lump the lines should instead turn outwards horizontally and parallel to the barrel flats.
On Bonehill’s 1884 patent guns the clip lump extended upwards between the barrels to form the rear of the top rib and barrel top extension. It also appears to extend to the short rear under rib and barrel loop.
Best Regards
Parabola
Last edited by Parabola; 11/14/21 06:38 PM. Reason: Further thoughts
