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The Isotope HydriumX “The Judge” is a limited-edition dive watch with a black dial, white luminous Arabic numerals and red hands and bezel. Isotope says it made 100 individually numbered examples. Its official archive currently lists the model as sold out; the £700 price reported at launch in 2022 is historical, not a current asking price.
What is the Isotope HydriumX “The Judge”?
“The Judge” is a limited-edition version of Isotope’s HydriumX dive watch. Isotope describes the black, white and red color scheme as drawing on traditional judges’ dress colors. Its product page frames the theme with the line, “Time is our worst enemy, are you ready to do it justice?” That is brand copy, not a quotation from a named judge or watchmaker.
The case is micro-blasted stainless steel, with a screw-down crown, red bezel insert and double-domed anti-reflective sapphire crystal. The official product page also asks, “Are you ready to let ‘The Judge’ rule on yours?”
What are the verified specifications?
| Specification | Isotope’s stated detail |
|---|---|
| Edition | Limited to 100 individually numbered pieces |
| Case | Micro-blasted stainless steel; 40mm diameter; 48mm lug-to-lug |
| Thickness | 12.9mm case height, or 14.9mm including the double-domed crystal |
| Crystal | Double-domed anti-reflective sapphire |
| Bezel | Unidirectional, 120 clicks, with red insert |
| Water resistance | 300m / 30 atm / 1,000 ft |
| Movement | Automatic Swiss Landeron; 4Hz / 28,800 A/h |
| Power reserve and stated accuracy | 40 hours; -12/+12 seconds per day |
| Strap | 22mm quick-release FKM strap; 22mm lugs |
Isotope describes the movement finishing as including blued screws, engine-turned surfaces, horizontal striping and a branded rotor. These are maker-stated specifications and descriptions, not results from an independent test.
#1 Best Overall
- Stainless Steel case with Black Resin Band
- Black Dial with date window at 3 O'clock
- Luminous markers and hour hands; sweep second hand
- Anti-reverse bezel
- Water-resistant to 200 M (660 feet)
What makes the design distinctive?
The central design choice is the contrast: a black dial and white luminous Arabic numerals are paired with red hands and a red bezel. That three-color scheme carries the judges’ attire reference Isotope gives for the model. The red is not limited to a small dial detail; it is also used on the bezel insert, making the watch’s theme immediately legible.
The 40mm diameter and 48mm lug-to-lug measurement give two useful dimensions for judging fit. The stated height is 12.9mm for the case, rising to 14.9mm when the domed crystal is included. Those figures describe the watch’s dimensions; they do not establish how it will wear on a particular wrist.
Rank #2
- WATER-RESISTANT: these water-resistant men's dive watches are ISO scuba-approved to depths of 200 meters
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable 43.8mm stainless steel watch case and bracelet.
- LUMIBRITE DISPLAY: this men's automatic watch features a highly-legible display with LumiBrite hands and markers
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
How much did it cost, and can you buy one now?
Fratello’s introduction by Nacho Conde Garzón, published September 24, 2022, reported a launch price of £700 (about €800). That is a dated launch-era figure, not a confirmed current price or resale valuation. Isotope’s official archive currently marks HydriumX “The Judge” as sold out, as checked October 8, 2026. The archive status does not establish whether a pre-owned example is available elsewhere or what one might cost.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Will another 22mm strap fit?
The watch has 22mm lugs and was supplied with a 22mm quick-release FKM strap. Width alone does not guarantee that a third-party strap will fit or suit the watch. Before buying a replacement, check its lug fit, buckle dimensions, strap length and quick-release mechanism.
Quick Recap
Best Value
- Stainless steel case 43mm diameter x 12mm thick; Black dial; Luminous hands and hour markers
- Japanese quartz movement, PC32 Caliber; Assembled in Japan; SR626SW battery included; Watch weight: 170 grams
- Stainless steel band, 185mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp
- Flame Fusion crystal; Screw down crown; Uni-directional stainless steel bezel with black top bezel ring; 100 meter water resistant: Suitable for recreational surfing, swimming, snorkeling, sailing and water sports. Not suitable for diving
Rank #4
- Iconic Promaster watches with advanced functions designed to venture to the deepest depths.
- 3 Hand, Date
- Silver-Tone Stainless Steel
- Luminous Hands and Markers and Mineral Crystal
- Sustainably powered by any light, with our Eco-Drive technology this watch never needs a battery. ISO Certified, 200M Water Resistant and 5 Year Limited Warranty
Rank #3
- Stainless steel case 40mm diameter x 14.1mm thick; Exhibition case back; Black dial; Luminous hands.Band Length: 205mm
- NH35A Japanese Automatic movement, 24 jewel; Assembled in Malaysia; Watch weight 155 grams
- Includes gift box, instructions and 3 year limited manufacturer warranty; Invicta Customer Service can be reached at 1-800-327-7682 for questions (re: Additional links, band replacement, band adjustment, warranty questions, etc.)
Sources
- Isotope Watches: HydriumX “The Judge” product page — official design, edition and technical specifications.
- Fratello Watches: “Introducing: The Isotope HydriumX ‘The Judge’” — Nacho Conde Garzón, September 24, 2022; source for the reported launch price.
- Isotope Watches: Archive — official catalog status listing the model as sold out.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
