Posted by Steve C on January 04, 2001 at 00:04:16:
In Reply to: valve bass trombones posted by Arnie R. on January 03, 2001 at 20:51:57:
Cerveny has a 4 rotary valve bass bone in F. That's what there site calls it anyway
http://www.amati.cz/english/production/instruments/ctromb.htm