arkwright Posted March 1, 2021 Share Posted March 1, 2021 In the Wheatstone Ledgers, some concertinas are tagged "K.V.W.S." Does anyone know what that means? Quote Link to comment Share on other sites More sharing options...
Geoff Wooff Posted March 1, 2021 Share Posted March 1, 2021 (edited) Key Valve and Wrist Straps. Prior to the air button being operated by a "Key" there was a " Slide Valve" a lever that the thumb actuated with a sideways movement (S.V.) . Edited March 1, 2021 by Geoff Wooff Quote Link to comment Share on other sites More sharing options...
arkwright Posted March 3, 2021 Author Share Posted March 3, 2021 Thank you! Quote Link to comment Share on other sites More sharing options...
Mike Franch Posted March 7, 2021 Share Posted March 7, 2021 And, to my mind, the S.V. was much more convenient that the air button, but that's probably off topic. Quote Link to comment Share on other sites More sharing options...
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