Recent Duet At Auction in General Concertina Discussion Posted November 9, 2016 Hello All, So I bid on and won the recently discussed duet in the Malvern auction. It just arrived, and I have had a look at it. It is not a bass as Steven correctly summised, but as yet,(I am at work!) have not had time to chart its actual range. It plays fine, with little air leakage. It needs a bit of tuning of course. Interestingly, the action is riveted, not the usual Lachenal hook action. It has a Lachenal label inside the leather case. Did Lachenal make a riveted action ever? It is stamped "1876" above the capital "R" on the right habd side. Photos attached. Any information/speculation welcome.