Mido calls the Ocean Star 39 its most versatile Ocean Star, and the navy gradient model makes the case well. At 39mm and about 10.5mm thick, it is the first Ocean Star in this size, made for wrists and lifestyles that never quite clicked with a 42mm diver.

Launched in 2024 for the 80th anniversary of a collection that has been reliable since 1944, it has a dial with a relief pattern that evokes currents moving across the sand. Here it fades from navy blue to black, framed by a two-tone bezel insert on a unidirectional aluminum ring. Large round indexes and the hands are coated in Super-LumiNova, and there is a date window. Inside is Mido’s Caliber 72, based on the ETA A31.111, with 72 hours of power reserve and a Nivachron balance spring that resists magnetism and shocks. Sapphire crystal, a screw-down crown and a starfish-engraved screw-down back give it 200 meters of water resistance.

The three-link steel bracelet has polished center links, a folding clasp with diver extension and tool-free quick-release bars for swapping straps.

Mido Ocean Star 39 Blue, Reference M026.907.11.041.00

• 39mm stainless steel case, about 10.5mm thick, 46mm lug to lug
• Navy-to-black gradient relief dial with date
• Bi-color aluminum insert on a unidirectional bezel
• Automatic Caliber 72 (ETA A31.111 base), 25,200 vph
• 72-hour reserve, Nivachron balance spring
• Sapphire crystal, anti-reflective on both sides
• 200m water resistance
• Steel bracelet, 20mm lugs, folding clasp with extension

The right-sized Ocean Star: easy to wear from Monday’s meeting to Saturday’s swim.