Isotope Old Radium Black Ink Bronze x Espiral do Tempo

The Isotope Old Radium Black Ink Bronze x Espiral do Tempo is a current-production field watch with a cusn8 bronze case. It is priced well above the $499 median for the category. The caseback is open, so the movement is visible.

1 official photo · reader photos welcome

Price

$1,379

Material

Bronze

Grade / type

CuSn8 bronze

Water resistance

100 m

Type

Field

Case diameter

40.0 mm

Thickness

10.1 mm

Lug-to-lug

47 mm

Origin

United Kingdom

Movement

Automatic, self-winding

Caliber

Swiss Landeron

Power reserve

40 hours

Complications

Date

Construction

Assembled

Finish technology

Natural finish

Caseback

Titanium (sandblasted, exhibition)

Nickel-free

Unconfirmed (bracelet, strap, or clasp hardware not confirmed)

Bracelet / strap

20mm quick-release black Italian calfskin strap with a brushed bronze buckle

Crystal

Anti-reflective sapphire

Display back

Yes

Dial

Black enamelled, bold Arabic numerals with Old Radium Super-LumiNova, date window at 3 o'clock with a black date disc

Dial colours

Black

Lume

Old Radium Super-LumiNova

Availability

Offered

Status

Current (limited edition of 65, individually numbered)

Not published

Reference, Weight, Colour, Hardness, Surface treatment, Matching bracelet

High confidence Verified Sep 2026 Source: Isotope (maker product page)

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