List of Keyboards 

The oldest known Square Piano by this firm

Photo Credit: Andreas Praefcke Wikicommons

https://www.youtube.com/watch?v=3RAkKb5HI_c&list=PLy8ZuBE1RYHFM-Nl-04vE-An8Rk7mfo5t

Photo Credit: Piotrus Wikicommons

https://www.youtube.com/watch?v=3RAkKb5HI_c&list=PLy8ZuBE1RYHFM-Nl-04vE-An8Rk7mfo5t

The name label on this piano reads, in part, "Ignaz Bösendorfer, Brodmanns Schüler". This suggests the piano was made during the period just before Bösendorfer (who had worked his way up in master builder Joseph Brodmann's shop from apprentice to foreman,) took over the shop upon Brodmann's retirement. Slightly later Bösendorfer piano labels say "vormals Brodmann" (formerly Brodmann), indicating that the transition to new ownership was complete

https://www.youtube.com/watch?v=3RAkKb5HI_c&list=PLy8ZuBE1RYHFM-Nl-04vE-An8Rk7mfo5t

-Viennese action
-Knee-lever for dampers

-Hand stop for moderator

-Compass : FF-g'''

Photo Credit: Uni Leipzig

Credit: National Music Museum, Portugal Wikicommons

This instrument was heavily altered by Franciolini