Keefer, E flat tuba, 3 piston, c.1916
Keefer, BB flat helicon, 3 piston, c.1918
Keefer, BB flat sousaphone, 3 rotary, c.1920
Keefer, EE flat tuba, 3 pistons, c.1922
Keefer, Bb Baritone, 3 piston, c. 1923
Keefer, BB flat sousaphone, 4 piston, c.1939
Keefer, BB flat sousaphone, 3 piston, c.1941
V & E Simonetti Historic Tuba Collection 