SKL Nautil Open Heart Navy

The SKL Nautil Open Heart Navy is a Seiko Mod open-heart watch. It combines the two strongest signatures of the genre: the striped navy blue of historical sport chic and the window onto the balance wheel. The dial's horizontal stripes extend to the opening where the movement beats, visible at all times. Integrated bracelet, butterfly clasp, a seamless silhouette. It is the living version of the most iconic combination in sports watchmaking.

The navy blue open to the movement

The horizontal stripes guide the eye towards the balance wheel window, whose continuous oscillation animates the dial like a pulse. Luminous applied indexes, polished hands, 41mm 316L steel case, sapphire crystal, transparent case back. The absence of a date window, specific to this caliber, keeps the dial symmetrical: nothing competes with the spectacle. The blue darkens towards the edges, true to the codes of the genre. The oscillation of the balance wheel animates the blue in the peripheral vision: it is perceived even before looking at the time. Few everyday objects offer this permanent beat.

A true Seiko NH38 caliber

The NH38 of this Seiko Mod comes from Seiko Instruments' Japanese workshops, a date-free version of the automatic caliber. 24 jewels, 21,600 vibrations per hour, 41 hours of power reserve. Winding by wear or crown, hacking second hand. Accuracy of -20 to +40 seconds per day, the caliber's standard.

From the office to dinner

The navy blue makes it as legitimate in a meeting as it is at an evening event, and the opening takes care of the rest of the conversation. 5 ATM water resistance: showering and surface swimming covered. Just avoid diving with it. In a long meeting, the balance wheel is a discreet and hypnotic companion.

A gift with a double meaning

Classic enthusiasts will see the iconic blue, the curious will see the balance wheel. It's the open heart that appeals to both schools. Diplomas, promotions, birthdays. 3-year warranty, delivered in its SKL case.

The comfort of the butterfly clasp

The double-folding clasp distributes the closure on both sides. The bracelet maintains its perfect curve and wears less than a single buckle. Adjustment link by link at a watchmaker.