Brunswick Main Spring 1" x 0.025" x 16' Oblong & Pear/Pear Arbor 5/8" (HQ37-R) Diaphragm DimensionsWidth - 1 13/16"Length -

DimensionsWidth - 1 13/16"Length - 3"Thickness - 3/64"

Diameter of Pin Hole - 5/64"Material - Steel

Thickness: 1/2"

Standard Model AStandard Model BDimensionsLength of Mandrel - 4 5/8"Diameter of Mandrel Large End - 1 53/64"Diameter of Mandrel Small End - 1 11/16"Diameter of Pulley - 1 23/64"Diameter of Pulley Recess - 1 1/4"Width of Pulley - 11/32"Width of Pulley Recess - 9/32"Diameter of Shaft - 5/16"Length of Shaft Long End - ~1 23/64"Length of Shaft Short End - ~1/2"Material - Steel and Nickeled Brass

Thickness: 25/54"

Brunswick Main Spring 1" x 0.025" x 16' Oblong & Pear/Pear Arbor 5/8" (HQ37-R) Diaphragm DimensionsWidth - 1 13/16"Length -Main Spring for: Amberola Adler Royal Arionola Bent Blue Ribbon Brunswick Butterfly Cheney Claxtonia Crescent Crown Crystola Dayton Emerson Euphonic Geo. P. Bent Hallet and Davis Harmona Kimberly Krasberg Krasco Librola Lois Majestic Markel Meisselbach Nos 16, 17, 18, 19, 19A Meteor Modernola Monroe New Type Portophone Old type United Paramount Perfektone Perkins Pooley Portophone Premier Rishell Roemer Royal Saal Types DD, CC Silvertone Sonora