Mid 20th C. RCA We Use RCA Tubes Service Caddy 1900s early 20th century 2 cm) electrodynamic speaker with

2 cm) electrodynamic speaker with field excitation coil

overbuilt form typical of industrial hardware from the early 1900s

5" W x 19" D x 43" H

rounded shoulder

Early 20th-century Fischer schematic eye apparatus housed in its original black storage box

Mid 20th C. RCA We Use RCA Tubes Service Caddy 1900s early 20th century 2 cm) electrodynamic speaker withBlack textured tube caddy marked "WE USE RCA TUBES" to the exterior and "We Recommend RCA Silverama Super Aluminized Picture Tubes" to the interior lid panel. Fitted with metal corner guards, latches, and carry handle, the case opens to reveal folding side compartments filled with assorted boxed vacuum tubes, including RCA, GE, CBS, and others. Surface wear, edge scuffs, and oxidation to hardware present; tubes untested; contents included as found.