Isotope · Microbrand · United Kingdom

Isotope Hydrium (G101)

Limited · Diver

Isotope Hydrium The Orange One, orange dial
Photo: Isotope
  • Isotope Hydrium California, black California dial
  • Isotope Hydrium Coconut Island, silver dial with palm-tree hands
  • Isotope Hydrium NASA, off-white dial, white strap
  • Isotope Hydrium Racing Green Orange, green dial, orange strap
  • Isotope Hydrium Revuelta Amarillo, yellow dial
  • Isotope Hydrium Revuelta Azul, blue dial
  • Isotope Hydrium Snooty, printed artwork dial
  • Isotope Hydrium Trippy, moiré dial with mushroom hands
  • Isotope Hydrium Ice Fall, amethyst stone dial
  • Isotope Hydrium Wasabi, green dial with chopstick hands
  • Isotope Hydrium Ooh La La, red-to-yellow dégradé dial
From $1,786 to $1,986
  • La Joux-Perret G101
  • 40 mm × 14.9 mm
  • Sapphire crystal
  • 300 m water resistance

Movement

Type
Automatic
Tier
Premium
Complications
Time only
Frequency
28,800 bph
Power reserve
68 h
Hacking
Yes
Accuracy (factory)
—
Grade
Soigné
Modifications
Custom Isotope Lacrima rotor

Case

Diameter
40 mm
Lug to lug
48 mm
Thickness
14.9 mm
Lug width
22 mm
Material
Steel (316L)
Hardening
—
Water resistance
300 m
Crown
Screw-down
Case back
Display, screw-down
Bezel
Unidirectional, 120 clicks
Finishing
Micro-blasted (Cerakote coating on some editions)

Crystal & dial

Crystal
Sapphire
Shape
Double-domed
Anti-reflective
Yes (side not stated)
Lume
Super-LumiNova

Bracelet & clasp

Style
—
Links per row
—
Solid end links
—
Solid links
Yes
Link attachment
Screws
Taper
22 → 18 mm
Quick release
Yes
Half links
—
Clasp
—
Micro-adjust
On-the-fly
Diver extension
—

Straps

Strap 1
FKM rubber, quick release, 22mm (or 22/20mm) quick-release FKM, most editions; some add suede, leather, Z.A. single-pass or NASA straps

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
The Orange One—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Californiablack FKM strapMsrp1,340 GBPincl. VAT$1,7862026-10-24link
Californiatan suede strapMsrp1,420 GBPincl. VAT$1,8932026-10-24link
Californiablack FKM and tan suede strapsMsrp1,460 GBPincl. VAT$1,9462026-10-24link
Coconut Island—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
NASA—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Racing Green Orange—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Revuelta Amarillo—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Revuelta Azul—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Snooty—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Trippy—Msrp1,490 GBPincl. VAT$1,9862026-10-24link
Wasabi—Msrp1,490 GBPincl. VAT$1,9862025-08-01link
Ooh La La—Msrp1,490 GBPincl. VAT$1,9862025-08-01link

Variants

NameDialConfigurationStatus
The Orange Onematte orangesingle-pass Z.A. strap plus orange or grey FKM tropical strapLimited
Californiablack textured California (Roman and Arabic numerals)—Limited (200)
Coconut Islandsilver sunburst with brown numeralssuede strapLimited (20)
NASAoff-white, full lumeCerakote-coated case; white FKM and NASA strapsLimited (200)
Racing Green OrangeBritish racing green with checkered chapter ringorange FKM strapLimited (100)
Revuelta Amarilloyellowyellow FKM strapLimited (50)
Revuelta Azulmatte blueblue FKM strapLimited (50)
Snootyprinted artworkCerakote-coated case; orange or ice blue FKM strapLimited (20)
Trippymoiré spiralgrey FKM strapLimited (20)
Ice Falltranslucent Brazilian amethyst (0.4mm stone dial)white FKM strapLimited (20)
Wasabifull-lume wasabi green with sushi illustrationswhite FKM strapLimited (20)
Ooh La Lared-to-yellow dégradé, sapphire crystal handsred FKM strapLimited (20)

About this entry

79% of key specs known. Missing: weight, hardening, bracelet links, end links.

The Hydrium dive watch with the La Joux-Perret G101 Soigné (time only, 68h, 24 jewels; Isotope: "tested in 4 positions, averaging ±7 seconds/day", the Soigné grade spec). The same case with the Swiss Landeron 24 is a separate model, hydrium-landeron-24; several editions (California, NASA, Revuelta) were sold with either movement, and their edition sizes cover both builds. Shared spec table: micro-blasted 316L steel, 40mm and 48mm with lugs, 12.9mm case height and 14.9mm with the double-domed sapphire (both from Isotope; Monochrome and Worn & Wound give the same 48mm and 14.9mm), AR sapphire, screw-down exhibition caseback, 120-click unidirectional bezel, screw-down crown at 3, 300m, Super-LumiNova on hands and dial, 22mm lugs. Every Hydrium is a limited or special edition: Coconut Island, Snooty and Trippy 20 pieces each, Racing Green Orange 100, Revuelta Amarillo and Azul 50 each (architect Luis Revuelta), NASA 200 (Cerakote-coated case, full-lume dial and bezel), California 200 (per Isotope's page text and Monochrome); The Orange One's edition size isn't stated. Snooty's case is also Cerakote-coated. On 2026-10-25 Coconut Island, Snooty, Trippy, California, Revuelta Azul and the G101 Revuelta Amarillo were sold out; The Orange One, NASA and Racing Green Orange were available. Bracelet details are from the separately sold Hydrium S.S. Bracelet (£268: bead-blasted 316L, solid screw links, quick-release, 22mm tapering to 18mm, signed diver's clasp with tool-free on-the-fly micro-adjustment); none of these editions includes it. Prices include UK VAT. Weight isn't published. Three sold-out G101 editions are listed without a price: Wasabi and Ooh La La (July 2025, 20 pieces each, £1,490 at launch per Oracle of Time; full-lume green dial with sushi illustrations and chopstick hands, and a red-to-yellow dégradé dial with sapphire crystal hands) and Ice Fall (January 2026, 20 pieces; 0.4mm Brazilian amethyst dial through which the movement shows; no price found). Older Landeron-powered editions (Alba, Blue Night, Burnt Tangerine, the HydriumX and Hydrium Pro editions, Seconde/Seconde/) are recorded in hydrium-landeron-24; the Hydrium Pro's spec table gives the same 40mm case.

Last verified: 2026-10-25. Edit or correct this entry.

Sources