Gear ratio: 15:1
String Post length: 1"String Post Diameter: 1/4", 6,35 mm
Historical Information:
1962 - 1964 Epiphone Riviera
1962 - 1964 Epiphone Professional
1961 - 1964 Martin "F" series electrics
1956 - 1964 Martin D-18
1956 - 1964 Kay electric models (varied)
1956 - 1964 Rickenbacker electrics (varied)