Multi-piece stainless steel case. Sapphire, domed on both sides, anti-reflective coating inside. Stainless steel, screwed, see-through sapphire glass Centre hands for hours, minutes, week and month, subsidiary second at 9 h. Non-linear power reserve indication at 3 h, date window at 9 h, day window at 12 h, date, day and week corrector, stop-second