<https://www.concertina.net/forums/index.php?/topic/21213-new-to-concertina/#comment-204107>
<http://schema.org/text>
"I too have a Hohner D40, and before the ins and outs got the best of me, I noticed that the Hohners have one difference as compared to the Wheatstone button layout, at least the images I could locate. on the left hand, on the G row, button 1 is g / d, as opposed to b / a (push / pull).\n \n"
<https://www.concertina.net/forums/index.php?/topic/21213-new-to-concertina/&tab=comments#comment-204116>