It's a puzzle alright.

George P.
I completely agree.rgordon939 wrote:What else is interesting is how they extended the speed control knob with a brass pin. I doubt the factory would have done it that way.
I agree that there must have been a number of purchasers who were unhappy with the Model B speed control having been put out of handy reach. Those with collections of brown wax would have been at a disadvantage adjusting between 160, 144, and even 120 rpm on a factory Standard Model B. That fact that Martin has documented eighteen of these modifications suggests that some dealers offered the alteration as a service. (Thanks for that, Martin!)FellowCollector wrote: The odd brass pin on the end of the speed control knob (which definitely appears to be Edison) leads me to believe that the original owner (or possibly a subsequent one) simply wanted to be able to control the speed top side rather than having to remove the crank, lift the works and adjust the speed.