I'm not sure whether this is the answer you are after, but I held that exact 'fully restored' listed concertina in my hands a few weeks back. I found splits in the internal folds of the bellows; at least three other leaks to the bottom corners; two reeds not voicing and cracks in the the wooden ends. I don't think the seller really has a great love for his concertinas that are placed on ebay. All his listings are generic, often including the phrase 'This is a fully working concertina. unlike other Lachenals whose innards are totally shot selling at this price!'. The sort of thing you might expect to hear from a market trader 'flogging' things off ... Personally, I wouldn't pay £300 for it in that condition.