CONCERTINA 20 KEY MADE IN GERMANY by KLINGENTHAL SPARES/REPAIR

Sounds like lots of components rattling inside also numerous holes in the bellows some as shown in the photographs.

It does play faint notes but will need extensive repair in my opinion. I did take the screws out of one end but couldn’t see a way to get the ends off so I thought I’d leave it to other others who might know.

Cosmetically, it is in excellent condition.

With original box and instructions.