quartz calendar, the circular black dial with luminescent nipple, baton, and triangle indices and baton-and-ball hour and second hand with baton minute hand, the aperture for the date at 3 o'clock, adjustable diver's bezel topped with a bayonet crown, fitted with a two-tone blackened PVD and yellow gold-plated bracelet with deployment buckle, the clasp moulded with the Heuer emblem, length approximately 170mm, bezel width approximately 28mm, 1980s