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40 mm
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Isotope

Hydrium "The Orange One"

DiverLimited edition

$1,695In stock

Last checked Oct 26, 2026

View on Isotope’s site ↗

From Isotope

Introducing Isotope’s Hydrium BSMH, “The Orange One.” This limited edition is unmistakably Isotope, blending bold design with rugged functionality and distinctive character. Its vibrant orange dial and hands, paired with a tough stainless steel case and a 120-click unidirectional bezel, are made for those who stand out from the crowd, embrace adventure, and dive headfirst into life. Although it can also be paired with an orange or grey FKM strap, “The Orange One” comes with a handmade, over-engineered Single-Pass OTAN strap, expertly crafted in Liverpool, England, by Z.A. Straps. It’s the perfect companion, whether above or below the waves. The colour orange had notable popularity in design and fashion during the 1970s . This era saw bold, vibrant colours take centre stage, with orange becoming a hallmark of retro aesthetics in interior design, clothing, and graphic art. The colour was often paired with earth tones like brown, mustard yellow, and avocado green, reflecting the decade's love for striking contrasts and groovy vibes. In the watch world, orange has also been a favourite colour for dive watches since the 1960s and 1970s. Its high visibility underwater made it a practical choice for professional divers. With only a few available, “The Orange One” stands out as a true original, bringing colour and dependability to every day. Bold and exciting, just like you are - this is an unmistakable Isotope, where everything feels fresh yet remains true to the brand’s DNA. The Isotope Hydrium BSMH "The Orange One" is still in stock and ready to ship worldwide. Technical Specifications • Micro-blasted case, 316L stainless steel • Case diameter 40mm X 48mm (with lugs) • Height 12.9mm (14.9mm with double domed Sapphire Crystal) • Hydrium® screw-down exhibition case back • Uni-directional Stainless Steel bezel with 120 clicks • Anti-reflective crystal sapphire • Screw-down crown at 3 o’clock • Matte Orange dial, with Railroad Track in Black • Isotope "i" Orange hands filled with Super- LumiNova® • Water-resistance 300m / 30 ATM / 1000 ft • 22mm Single-Pass Z. A. Strap (Made in England) and a quick-release orange or grey FKM tropical strap (please include a note with your preferred choice) Swiss Made La Joux Perret G101 Soigné Movement Automatic, self-winding Power reserve 68 hours 24 Jewels, 28800A/h Accuracy: Tested in 4 positions, averaging ±7 seconds/day Soigné finish with a custom Isotope Lacrima rotor Swiss Landeron Mechanical Movement (no longer available) • Automatic, self-winding • Power reserve 40 hours • 25 Jewels, 28800A/h • Accuracy -12/+12 s/day • Customised finishing with blued screws, Perlage and Côtes de Genève

Specifications

Details and photos come from Isotope’s website, last checked Oct 26, 2026. Specs were read automatically and may contain mistakes.

Case

Diameter
40 mm
Lug-to-lug
Not listed
Thickness
12.9 mm
Thickness incl. crystal
Not listed
Lug width
Not listed
Material
Not listed

Movement

Type
Automatic
Caliber
Not listed
Power reserve
68 h
Functions
Not listed

Crystal and bezel

Crystal
Sapphire
Bezel
Not listed

Water resistance

Rated to
300 m

Dial and lume

Dial
Not listed
Lume
Not listed

Strap

Strap
Not listed
Every spec Isotope lists
Accuracy
Tested in 4 positions, averaging ±7 seconds/day

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