LZ127 Graf Zeppelin Automatic Open Heart Watch 7666-4

The Watch
German watchmaker Zeppelin presents its Automatic 7666-4 open-heart model, giving enthusiasts a front-row view of the movement at work. True to the Zeppelin tradition, this timepiece sports an aviation-inspired aesthetic made for men who live that spirit. The case measures 40 mm in diameter and is crafted from polished stainless steel. A crown at three o'clock handles all time adjustments. A K1 mineral crystal sits over the dial, shielding it from shocks and scratches while keeping it looking pristine. The caseback is screwed and transparent.

The Dial
This round dial features a slightly deep brown background that pairs perfectly with the watch's other elements. A minutes railway track runs along its outer edge, with visible markers every five minutes. Twelve hour indices complete the dial, with two central hands indicating hours and minutes. The seconds are displayed via a 60-second sub-dial at the five o'clock index. Just to the left of that sub-dial, an open-heart aperture lets you admire the movement's caliber up close. Finally, several inscriptions appear on the dial: Made in Germany sits at six o'clock, Automatic at nine o'clock, and Zeppelin's own signature appears just below the twelve o'clock index.

The Movement
Drawing on Japanese precision engineering, this watch delivers a reliable, high-performance movement you can count on every day. The automatic caliber keeps the hands running smoothly without any intervention. Powered by a Miyota 82S5 caliber with 21 jewels, it offers a 40-hour power reserve.

The Strap
To complete the vintage yet elegant look of this timepiece, a brown leather strap with white contrast stitching adds a touch of refined style to the wrist. The pin buckle closure makes it easy to secure the strap, and the lug width measures 22 mm.

Water Resistance
This model offers water resistance up to 5 atmospheres (50 m). Beautifully crafted to turn heads in any setting, it holds its own against the elements without sacrificing elegance. You can wear it in the shower, though the Ocarat team recommends setting it safely on the edge of the sink to preserve its brilliance and integrity over time. Swimming and diving, however, are strongly discouraged - doing so risks damaging the watch and leaving you with costly repair bills.