"Master Link" (New York 1920 -1935 )

"Four Star" (New York 1935 -1940 )

"Tone Master" (New York 1940 -April 1946 )

"Eburnated Bar I" (New York 1937 -1940 )

"Eburnated Bar II" (New York 1940 -1941 )

"Reso Chamber" (New York 1941 -April 1946 )

"Improved Tone Master" (New York April 1946 - September 1949)

"Super Tone Master Double ring Long tooth rest" (New York October1949 >?)

"Super Tone Master Double ring short tooth rest" (New York >1955)

"Super Tone Master Double ring short tooth rest" (Florida 1955 >1965)

"Super Tone Master" no usa " (Florida 1965 >November 1967)