One of the fabled Joseph Tushinsky Vorsetzers has been listed for
sale on eBay.  The history of these units has been discussed before
on MMD in a series of posts by Jim Miller.  This one is Number 3 --
the Ampico/Duo-Art/Welte unit.  See

  http://www.mmdigest.com/Archives/KWIC/T/tushinsky.html  and
  http://www.mmdigest.com/Archives/Digests/201802/2018.02.14.04.html 

Quoting from the listing, "This Tushinsky "Tri-Plex" Vorsetzer was
the remarkable creation of the brilliant technician Jim Miller and,
with a simple turn of a single knob, could play all four types of
piano rolls: Welte T-100 (Red), Welte Licensee, Duo-Art, Ampico."

The unit appears to be located in Toronto, Canada.

Larry Kerecman

 [ https://www.ebay.com/itm/173705839849