Hi, I just put a ‘rare’ german English Concertina for sale on eBay UK. https://www.ebay.co.uk/itm/English-Concertina-Made-In-Germany/372816298603?pageci=78ebc945-e124-4c9c-8ff6-e0eab841d936 Can’t really find any information online regarding the manufacturer, if anyone has got any relevant information I could add it to the description.    If anyone is interested drop me a message, I would rather deal outside ebay and contribute a percentage to the forum.   Thanks