Isotope · Microbrand · United Kingdom

Isotope Old Radium

In production · Pilot

Isotope Old Radium Bronze Pilot, olive green dial
Photo: Isotope
  • Isotope Old Radium Bronze Pilot, ox blood red dial
  • Isotope Old Radium Bronze Pilot, ash grey dial
  • Isotope Old Radium Black Ink Bronze x Espiral do Tempo, black enamel dial
  • Isotope Old Radium Polar Enamel, white enamel dial
  • Isotope Old Radium Bronze Tobacco, tobacco brown dial
  • Isotope Old Radium Portugal-UK 650, white enamel dial
From $1,280 to $1,600
  • Landeron 24
  • 40 mm × 10.1 mm
  • Sapphire crystal
  • 100 m water resistance

Movement

Type
Automatic
Tier
Upper
Complications
Date
Frequency
28,800 bph
Power reserve
40 h
Hacking
Yes
Accuracy (factory)
—
Brand regulation
-12 / +12 s/day
Modifications
Decorated with Côtes de Genève and perlage

Case

Diameter
40 mm
Lug to lug
47 mm
Thickness
10.1 mm
Lug width
20 mm
Material
Bronze (CuSn8)
Hardening
—
Water resistance
100 m
Crown
Screw-down
Case back
Display
Bezel
—
Finishing
Brushed bronze; sandblasted titanium caseback

Crystal & dial

Crystal
Sapphire
Shape
—
Anti-reflective
Yes (side not stated)
Lume
Super-LumiNova (Old Radium colour)

Bracelet

Bracelet
—

Straps

Strap 1
Leather, quick release, 20mm quick-release calfskin or suede strap with a brushed bronze buckle

Weight

Head only
—
On bracelet
—
On strap
—

Prices

VariantConfigurationTypePriceUSDAs ofSource
Bronze Pilot Olive Green—Msrp960 GBP$1,2802026-10-24link
Bronze Pilot Ox Blood Red—Msrp960 GBP$1,2802026-10-24link
Bronze Pilot Ash Grey—Msrp960 GBP$1,2802026-10-24link
Black Ink Bronze x Espiral do Tempo—Msrp1,200 GBP$1,6002026-10-24link
Polar Enamel—Msrp1,200 GBP$1,6002026-10-24link

Variants

NameDialConfigurationStatus
Bronze Pilot Olive Greenolive green textured with black Lacrimacalfskin strap—
Bronze Pilot Ox Blood Redox blood red textured with black Lacrimacalfskin strap—
Bronze Pilot Ash Greyash grey textured with black Lacrimacalfskin strap—
Black Ink Bronze x Espiral do Tempoblack enamelledblack calfskin strapLimited (65)
Polar Enamelwhite enamelledsuede strapLimited (300)
Bronze Tobaccotobacco brown textured with military olive Lacrima, no datecalfskin strap and Didymostraps Marine Nationale strapLimited (100)
Portugal-UK 650white milk enamelled with black minute ringblack calfskin strap; caseback sapphire painted with the coats of arms of Portugal and EnglandLimited (65)

About this entry

80% of key specs known. Missing: weight, hardening, bracelet offered.

Isotope's bronze pilot's watch. Shared spec table: brushed CuSn8 bronze case (92% copper, 7.7% tin, 0.3% phosphorus) with a sandblasted titanium exhibition caseback, 40mm and 47mm with lugs, height 10.1mm, AR sapphire crystal, screw-down crown at 3, 100m ("light swim rated"), aged-radium-coloured Super-LumiNova on numerals and bronze sword hands, 20mm quick-release strap with a bronze buckle. Movement: the Bronze Pilot page names the Swiss Landeron calibre 24; the other pages say "Swiss Landeron Mechanical Movement" with the same specs (25 jewels, 28,800 A/h, 40h, -12/+12 s/day, Côtes de Genève and perlage). All three listings show a date window at 3 (stated for the enamel editions, visible in the Bronze Pilot photos). Variants: Bronze Pilot in Olive Green, Ox Blood Red and Ash Grey (£960; only Ash Grey in stock on 2026-10-25; the page mentions batches rather than an edition size), Black Ink Bronze x Espiral do Tempo with the Portuguese magazine (65 numbered pieces, black enamelled dial) and Polar Enamel (300 numbered pieces, white enamel dial), both £1,200. Prices include UK VAT. Two sold-out editions are listed without a price: Bronze Tobacco (November 2022, 100 numbered pieces; tobacco brown dial with an olive Lacrima and, unlike the other versions, no date window; calfskin strap plus a Marine Nationale strap by Didymostraps; Worn & Wound quotes only "about $1,111 (after currency conversion)", so no price is recorded) and Portugal-UK 650 (June 2023, with Espiral do Tempo for the 650th anniversary of the Anglo-Portuguese alliance; 65 pieces; white enamelled dial with a date window at 3, caseback sapphire painted with the two coats of arms; Landeron 24; no price found). The model's date complication therefore doesn't apply to the Bronze Tobacco. Caseback attachment, crystal shape and weight aren't published.

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

Sources