Audemars Piguet Selfwinding

Audemars Piguet's Royal Oak Selfwinding 15551ST.ZZ.1356ST.04 is a steel watch measuring 37 mm across and 9.1 mm thick. It is set with diamonds, and the dial is blue with the brand's Grande Tapisserie pattern. A sapphire crystal covers the dial, and the case houses the self-winding calibre 5900, with functions limited to hours, minutes, central seconds and date. The date sits within the dial layout without disrupting its symmetry. Central seconds keep the display straightforward despite the gem-setting. A steel bracelet with AP's folding clasp completes the watch. Water resistance is rated to 50 metres, modest but typical for the line.