I recently purchased a Shopmaster L-500 lathe. It has been restored to its original condition, unfortunately it did not include a manual. This particular lathe has a 4-stepped pulley in the headstock and originally had a 4 step pulley on the motor (though the restored motor has only three.)
Researching about pulley drives on lathes, I have heard mention of a Reeve's Drive, but I don't think that this is an actual Reeve's mechanism because there is no facility to push or pull the pulleys to move the belt.
Does anyone with an older vintage lathe have any suggestions on how to properly change the speed of the lathe?
Here's a view of the headstock and the pulleys inside:
And here's a photo at the motor: