SKL Nautil Open Heart Chocolate

The SKL Nautil Open Heart Chocolate is a Seiko Mod open-heart watch. A cutout window in the chocolate dial reveals the continuously beating balance wheel. A permanent mechanical spectacle within a sport-chic design. The deep brown of the dial frames this opening, and the integrated bracelet unfurls its flat links. The butterfly clasp disappears on the wrist. This is the watch for those who want to see time being made, not just read it.

The open-heart balance wheel

The dial opening exposes the most vibrant part of the movement: the balance wheel, oscillating seven times per second under the sapphire crystal. The satin chocolate dial absorbs light around the window to better focus it on the mechanics. Applied indices, polished hands, 41mm 316L steel case, and a transparent case back extending the spectacle to the rear. This caliber beats without a date window: the dial remains perfectly symmetrical, uncluttered, and focused on the essential. The window is bordered by a clean chamfer that frames the balance wheel flawlessly. This is how an open heart is judged, and this one is pristine. The satin chocolate does the rest.

The automatic Seiko NH38 caliber

This Seiko Mod features a genuine NH38 manufactured in Japan by Seiko Instruments. It's the streamlined, no-date version of the automatic caliber, with 24 jewels, 21,600 vibrations per hour, 41 hours of power reserve, and winding both by wear and by the crown. Accuracy is -20 to +40 seconds per day, which is standard for the caliber.

Wear it, show it off

It transforms every glance at the time into a mechanical pause, and every dinner into a demonstration. Office, evenings, weekends: the chocolate keeps it understated despite the spectacle. 5 ATM water resistance: showering and surface swimming are covered. Just avoid diving with it. During the day's breaks, it offers thirty seconds of free contemplation.

The gift for the curious

For those who disassemble, tinker, and understand: offering an open heart is offering hours of contemplation. An ideal first mechanical movement. 3-year warranty, in its SKL box.

The butterfly clasp

The double-fold clasp opens with two pushers and disappears when folded. The bracelet appears endless, and the watch slips on like a jeweler's bracelet. Adjustment link by link at the watchmaker.