Dave Sr. from SWISCO responded:
July 20, 2017
I believe the mounting screw could be our 33-081. AS for the operators, see our 39-025 and 39-026. Your hole measurements on the bottom seem a little too wide. I would double check that measurement. They should be closer to 1-1/8". Take a look at the parts suggested to see it they match up to yours, especially the gearing.
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