project or parts, obviously some buttons missing. measures 12.5cm long when closed, across the face is 13cm. bellows decent condition, one hole which you can see on the photographs which could be glued over with a bit of leather. lachenal style but possibly german in origin.
i have received an email which states your concertina is a German copy of a London-made George Jones concertina rather than a Lachenal (see attachment for a comparison - the Mayers label is for the dealer rather than the maker).