Wheatstone 31 key Linota concertina, serial number 31470, with pierced metal end plates applied with brass name and number plaques, rosewood hexagonal body, 15.7cm wide Condition report: overall wear and tear evident from a working life with age and use. The bellows have two old repairs (one of which has now failed) as well as a hole to one corner. All keys function each playing two tones, the instrument plays with plenty of volume.