Hello again Gabriel:
Your serial number puts the machine just a few hundred below the
introduction of the Triumph. The motor number is correct for that machine.
All good
news since the Speed Control Knob was standardized by this time so there
should be no problem locating the correct part. I suspect the person who sold
you the speed control may have thought it was for a Triumph/Springmotor but
it likely is for a Home A or Standard A, possibly even for an ICS machine
made much later. At the moment all of my machines are in storage so I cannot
take a thread gauge and micrometer to determine what the correct screw size
is for a Springmotor. I do remember that the 'suitcase Home' speed knob is
a 10-32 thread. It is optimally 0.190" in diameter. If you have a
micrometer you can check the diameter of the shaft that is too narrow.
I will keep digging. Meanwhile, give Dwayne a call at Wyatt's, I would bet
he has an early Triumph Speed Control Knob of correct thread.
Best wishes,
Al
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