It is Welte Mignon, with an "e". The Welte was another reproducer like Duo Art and Ampico. Not as well know but from what I have heard just as capable. There was also the Foresetzer (German for "before sitting") which was a player or reproducer the was rolled up to the front of any piano and played it. I wish they made one today. The two biggies were not the only players in the field. :) (pun intended) Newton
This PTG archive page provided courtesy of Moy Piano Service, LLC