The Oyster Perpetual Sky-Dweller is a distinctive watch with a rich blue dial and Oyster bracelet. Its unique rotatable Ring Command bezel allows the wearer to set its functions. The watch also features a second time zone display on an off-centre disc, and an ingenious Saros annual calendar that only needs to be adjusted on March 1st. Crafted from Oystersteel and white gold, the 42mm model has a monobloc middle case, screw-down case back, and winding crown. Its scratch-resistant sapphire crystal has a Cyclops lens over the date, and its water resistance is up to 100m/330ft.

Powering the watch is a Perpetual, mechanical, self-winding movement with dual time zones and an annual calendar, and a Paramagnetic blue Parachrom hairspring. It has a bidirectional self-winding capability and a power reserve of approximately 72 hours. It has a precision of -2/+2 sec/day and functions such as centre hour, minute, and seconds hands, and stop-seconds for precise time setting.