Hi there Steve,
I am amazed that it took only 5 minutes for your reply! What an amazing web site.
I have the drawing beside me and the details are as follows:
12 teeth at 2 3/4" pitch on 10.5" diameter (centre of the teeth depth?)
Outside Diameter of gear is 12 1/4"
Inside Diameter (for shaft) is 4 5/8"
2 keyways 1 1/4" wide and 7/16" deep @ 1/3 (of circumference) apart
If we have a match would be pleased to exchange contact details.
Many thanks
Dick
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