The enclosed front pulley gives away the identity of this "internally-geared" headstock. An epicyclic gear train, built into the cone pulley and activated by a single lever, produced a 4 : 1 reduction in spindle speed.
Designed for use with the milling-slide attachments, this 8" diameter index plate, with 20 circles of holes, could be attached to the standard or geared headstocks.
