I have just dug out my father's concertina which he owned and played as a Salvation Army officer from the 1940's. I don't know anything about concertinas but have become interested as I realise that his is in good condition. It is a Lachenal Edeophone with 48 buttons and has a serial number of 58850. The leather box looks original too. Can someone tell me approximately when it may have been made and if it is valuable now?