Hi There,
I bought this concertina because it has almost an almost identical design in its wooden end plates to the unusual metal ended Jeffries 26 button c/g that I already have. When it arrived, I could see no maker's mark. I opened it up and noted the similarities in action box design, reed pan, riveted lever action etc between the two concertinas. The design of the wooden handstrap block is also a very similar shape, which I think may be a bit of a give away. I then matched one of the reeds against the same reed from my own concertina and noted they matched exactly in dimension and elements. I then matched this reed against Wheatstone and Lachenal reeds and there was no resemblance there. I put the reed into my metal ended Jeffries and it played exactly in tune and with the same timbre (so it's in concert pitch). I'm therefore pretty sure this is a Jeffries, but without the maker's mark I don't know if it would carry the same value as my other Jeffries. I would welcome some views on this.
I intend to refurbish and restore this concertina and hope to do most of it myself. If it needs new ends made, then so be it. I'll let you know how it goes.
Cheers,
Frank