Boxford 2-pin gear to fit on headstock spindle and engage with the pulley
38-tooth gear to fit on the headstock spindle and engage with the headstock pulley as part of the backgear system.
The gear was made with two pressure angles:
1) 14.5-degrees for older lathes with a swing-type quadrant lever on the front face of the headstock, like this http://www.lathes.co.uk/boxford/img10.jpg