1910 - Steel • Vee Blade • Parallel • ½” (13) dia. axles
1920 - Steel • Vee Blade • Opposed • ½” (13) dia. axles
1970 - Steel • Airfoil Blade • Parallel • ½” (13) dia. axles
1975 - Steel • Airfoil Blade • Opposed • ½” (13) dia. axles
1980 - Steel • Airfoil Blade • Parallel • ¾” (19) dia. axles
1985 - Steel • Airfoil Blade • Opposed • ¾” (19) dia. axles
1917 - Steel • Vee Blade • Parallel • ¾” (19) dia. axles
1927 - Steel • Vee Blade • Opposed • ¾” (19) dia. axles