Case is 41mm with a thickness of 10.7mm; 18k white gold bezel, lugs and caseback; while the case middle and crown are in black ceramic. Automatic in house calibre 4310 with starwheel module. Dial in aventurine, three rotating disc to display the hour while the minutes are on the top. Power reserve is 70hrs Priced at CHF 48,000 WatchProfessor’s take: the Wandering Hour (Starwheel) has been around for over a century, but the display still has an avant garde edge to it, many still see this display as revolutionary. The last AP Starwheel was from the early 90s making this 1159 Starwheel a notable edition, lovely aventurine dial adding a refined touch.