Nope, that's wear, not a manufactured part. The small bevel at the flywheel end of the drive gear would have been the original taper to assist the gear in engaging the flywheel ring gear. That one must have done a lot of grinding to wear the teeth back that far!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!