The dials, are striking blue with white Roman numeral hour markers. They differ in their layout, the steel model (Ref. 2227-STC-00508) has a cutout at 12 o’clock to display the balance wheel, while the rose-gold-PVD version (Ref. 2237-PC5-00508) has an opaque blue dial with a date window at 3 o’clock.
Both are powered by the same mechanical, self-winding movement, Caliber RW4200, offer a 38-hour power reserve. The movement, which runs in 26 jewels, is visible through a clear sapphire window in the snap-on caseback. Water resistance to 50 metres, and mounted on alligator style leather straps, feature white stitching and a folding clasp closure.