Benjamin clearer tone anti-microphonic valveholder
1927
Aermonic valve holder model A
1927
B9G valve holder
Ceramic valve holder for acorn type valves
International octal valve holder
Side contact valve holder
Bretwood valve holder
Ceramic insulated 4 pin valve holder
Insulated valve holder
4 pin valve holder
W.B. 7 pin valve holder with carton
Parex Screened Grid Valve Holder for type L valves
5 pin valve holder, for mounting valve horizontal
B9A valve holder
Parex Screened Grid Valve Holder for Type S Valves
W.B. 9-pin valve holder with carton
W.B. 5 pin valve holder with carton
Mazda octal valve holder
Benjamin anti microphonic 4 pin valve holder
Benjamin Vibrolder valve holder
circa 1930s