This came to me via Tom Harr. This action was only installed in players as far as I know. I have only seen a couple of these, and they made a grand action that was equally unique. I do still have that piano in my clientele. - Mark Ritchie
The immediately obvious features of the Staib-Abendschien “Mastertouch” action are the absence of bridle-tapes (that is, there never were any), and the peculiar location of the back-checks on the butts, instead of on the wippens, which act on the jacks. Or, it could be said that the jack acts as the check and the item on the butt is the back-catch. Read more about this in the June 2006 issue of the Buckeye Backcheck.