On Sat, 28 Sep 2013, Til128 at aol.com wrote: > Pinion - 307846 > Driven - 307847 Looks like it's for 100 wpm, 600 opm, with 3000 RPM sync motor running on 50 Hz. 573-116-800TC Issue 3 December 1970 for Model 28 KSR and RO.