Similar to machines made in the United States by Stark, Ames, Sloan & Chace, Waltham and other makers of watch-factory equipment and in Europe by Petermann, Wolf Jahn and some Swiss makers, the American Watch Tool Co. automatic pinion cutter was designed for producing small, precision gears and pinions in steel, brass or cast iron. The arbor accepted standard gear cutters and the work could be held between centres or on stub arbors held in collets. 12 spindle speeds were available from 75 to 16000 r.p.m.