While I can't say that I have owned a T.O.C. Shaft Driven Bike - - - - - - -I CAN say..............I had one for over 15 years , and rode it a fair amount of times.
@Freqman1 is right about the tolerance with the gears , they need to "Mesh" properly under all forms of use. My bet is most owners probably couldn't do a proper adjustment to their ( T.O.C. ) bikes , and eventually they went by the wayside or were just never ridden again . Darn near anyone can adjust a chain . So maybe EARLY Shaft driven bikes are rarer ...........I don't know , but I don't see them very often. Soooooo with that said............. Here's a few pic's of my old
" Fendt Cardano " a German made - MODERN ( 1982 ) Shaft drive Bicycle . 3 Speed , Rear Coaster Brake , Front Caliper Brake , Generator powered Front and rear lights and the clock in the headlight shell is a wind -up ( wound from under the shell )

By The Way
@Balloonoob , not trying to hi jack your thread - - - - -but Dangit - - - - - - I think you opened up a pretty broad discussion here - - - - - I figured I'd add my 2c. and a few pic's as well.

Ride Safe Everyone !
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