Audemars Piguet Perpetual Calendar Ultra-Thin

Audemars Piguet's Royal Oak Perpetual Calendar Ultra-Thin, reference 26586XT.OO.1240XT.01, has a titanium case measuring 41 mm across. The case is only 6.2 mm thick, which is notable given the complication it houses. A sapphire crystal covers the salmon dial. Inside is the self-winding calibre 5133, an ultra-thin perpetual calendar movement. The watch shows date, weekday, month and moon phase alongside the perpetual calendar function, so it tracks leap years without correction. It comes on a titanium integrated bracelet, fitted with an AP folding clasp. Water resistance is a modest 50 metres, in keeping with its thin case construction.