Thanks to Dusty for the T-1 sprocket history shot! Over the years the sprockets were made with these specs…
Gower Power Sprockets: 1/4” thick 6061 Aluminum. 36T, 39T, 40T, 43T, 44T and 45T. Black and Silver. Same logo used throughout, but the placement of the logo and tooth size indicator were changed.
American Flyer Sprockets: 1/4” thick 6013 Aluminum. 23T, 24T, 25T, 27T, 28T, 30T, 31T, 33T and 36T. Black, Silver and Brown. Two different logos were used on these sprockets.
Logan’s Run Sprockets: 6mm thick 7075 T-6 Aluminum. 25T, 28T, 30T, 31T, 33T and 36T. Black, Silver, Red, Green, Steel Blue, Platinum, Dark Gray and Polished. Two different logos were used on these sprockets.