| Reference Ocarat | #100528 |
| Reference | HD1 «Or» |
| Brand | Humbert-Droz |
| Product Type | Watch |
| Gender | Men |
| Color | Black Blue |
| Material | Steel |
| Material Quality | 316L stainless steel |
| Finish | Black PVD Matte (Brushed / Satin) |
| Warranty | 2 Years |
| Thickness (in mm) | 13,50 |
| Diameter (in mm) | 43,00 |
| Manufacturing | France |
| Labels and Certificates | Authorized Retailer Limited Edition |
| Case Shape | Cushion |
| Dial Finish | Open heart Soleillée |
| Watch Case Back | Exhibition Case Back Screwed caseback |
| Glass Quality | Mineral Crystal |
| Buttons | 1 Crown |
| Screw Crown | Yes |
| Water Resistance (in ATM) | 10 |
| Frequency | 28,800 A/h (4 Hz) |
| Movements | Automatic (rotor) |
| Movement Type | Swiss Movement |
| Movement Brand | ETA |
| Calibers (Movements) | ETA 2824 |
| Calendar and Time | Hours Minutes Seconds |
| Power Reserve (Maximum Duration) | 38 hours |
| Display Type | Analog (hands) |
| Display Specifications | Arabic Numerals Indices and railroad track Luminescent Hands |
| Bracelet Material | Cordura |
| Strap Color | Blue |
| Topstitching | Yes |
| Watch Clasp | Deployment Clasp |
| Lug Width (in mm) | 24,00 |
| Limited Edition (Collector) | Yes |
Humbert Droz is a watchmaking brand expressing its expertise for over sixty years. Discover this stunning open-heart gold-tone watch from the HD1 collection. A limited edition of just 200 pieces, it features a cushion-shaped case in 316L stainless steel with a screw-secured black PVD finish. The case measures 43 mm in diameter and 13.5 mm thick - a perfect fit for men's wrists. The dial is protected by a mineral crystal, and on the right side you'll find a screw-down crown topped with a crown guard for setting hours and minutes. The screw-down transparent caseback ensures water resistance up to 10 ATM, or 100 meters.
Dressed in a sunray-finished blue dial, this round case frames silver time indicators in a calming, serene aesthetic. At 12 o'clock, an open heart reveals the movement beneath. A graduation around the dial perimeter shifts to yellow from 60 to 15 for easier reading, surrounding a minute track marked with white lines. The hours are indicated by nine baton indices and three Arabic numerals at 3, 6, and 9 o'clock. Three satin-finished steel hands filled with Luminova let you read the time even in the darkest conditions - the short hand for hours, the long hand for minutes, and the slim yellow arrow-tipped seconds hand. The brand name and movement type are signed at 6 o'clock.
This watch is powered by a Swiss-made ETA 2824 automatic movement. Featuring 25 jewels and beating at 28,800 BPH, this caliber delivers flawless precision and reliability. Its power reserve stands at 38 hours.
This on-trend cordura strap adds a touch of elegance to your wrist. In navy blue with yellow contrast stitching, it fastens with a stainless steel deployment clasp. The lug width is 24 mm.
With water resistance to 100 meters - or 10 ATM in the language of watchmaking - this boldly styled timepiece transitions effortlessly from black-tie events to the pool. Wear it in the shower, the bath, or during an energetic swim. Just keep in mind: our watchmaking experts confirm this model is not designed for scuba diving, freediving, or high-pressure water jets. Remember - shower, bath, and swimming only, and never operate the crown or pushers while submerged.





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Watch HD1 "Or"
(Ref. 100528)