Columbia Main Spring 3/4" (0.75) x .025" x 10' Pear/Pear VV-XVI tracing its origins from Thomas

tracing its origins from Thomas Edison’s groundbreaking tinfoil phonograph to the sophisticated devices of the 20th century

Length of Threads: 3/16"

and the impact of these visual materials on the branding and marketing of phonographs

Length - 1 63/64"

Columbia Main Spring 3/4" (0.75) x .025" x 10' Pear/Pear VV-XVI tracing its origins from ThomasMain Spring for: Bradley; Chum; Cirola; Columbia No 5; Cresent; Davis; Diamond; Domestic; Excelsior; Harmony; Heineman Nos. 32, 36, 37, 38; Majestic; Manophone; Markel; Meteor; Modernolette; Most Portables; Operola; Outing; Pathe III; Vitanola Dimensions Width 3 4" (0. 75) Thickness 0. 025" Length 10' Outer Connection Pear Inner Connection Pear Diameter of Arbor 3 8"