All catalogues; 'Canadian Time' stenciled in gold on the glass door; Arthur's trademark office clock; 15-day movement variant reported. Reported variants include a 15-day movement (reported, none found to date), a painted-glass-around-bezel version, a late-production frameless version with gold ‘Regulator’ lettering instead of ‘Canadian Time’, a factory-shortened case (floor board just below the dial, square door, pendulum through an oblong slit; Berlin label), and an Ottawa-labelled variant (label only recorded).