In Diggory Hadoke’s online Vintage Gun Journal I have read an October 2021 article about a F.T. Baker gun built with Needham’s patent ejectors.

I was struck by the similarity of the shape of the top lever to the one on the above Reilly gun. Greener took over Needham in 1874 but seems to have run them in parallel for the rest of that century.

If Needhan built the Baker gun, might they be a possible source for this Reilly boxlock?