I got these in a bag of other parts from a former, brass-reeded EC. Missing a few reeds, and many of them are mixed up - probably fell out and were shoved back in willy-nilly.
The number, if you can't make it out, is 23965. While I expect odds are it is (was) a Lachenal, the action parts (levers and posts) are gone, while the rest of the casework is in small pieces. I'm primarily an anglo player, and the few ECs I've looked in have a circular paper on the reed pan giving the note names, and the maker or at least a later rebuilder. Also, the Lachenals I know and love (and the others too) have the number somewhere on the chamber side of the reedpan, and this does not. Is it still probably a Lachenal? I guess Wheatstone and Jones are the only others whose serial numbers got this high.