Audemars Piguet "Jumbo" Extra-Thin Openworked

Audemars Piguet's Royal Oak "Jumbo" Extra-Thin Openworked, reference 16204XT.OO.1240XT.01, has a titanium case measuring 39 mm across. The case is a slim 8.1 mm thick, in keeping with the extra-thin profile the "Jumbo" name promises. A sapphire crystal covers the openworked dial, which lays bare the self-winding Calibre 7124 for anyone to study. The skeletonised construction is the main draw here, with hours and minutes the only functions on offer. The titanium integrated bracelet includes BMG links and closes with a three-blade folding clasp. Water resistance sits at 50 metres, adequate for a watch built around mechanical display rather than diving.