Old Radium Bronze Pilot


Tax included only within the UK
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Isotope Old Radium Bronze Pilot

In 1942 the Minister of Defence of the United Kingdom asked Isotope to produce watches for the armed forces, a request they happily obliged. The result of their efforts was a watch that was as handsome as it was sturdy. It quickly got the nickname 'Old Radium,' as the soldiers affectionately called it because of its charismatic luminous hands and hour markers.

This is what could have happened if it wasn't for the fact that Isotope was founded in 2016. However, this does give the brand the advantage of being able to invent its history in retrospect. The 'Old Radium’ is an ode to the brave pilots that fought the odds of WWII, which were often not in their favour. They fought for what was right with their magnificent aeroplanes, and the 'Old Radium' could have been a welcome companion on their missions. Its design is a subtle mix of straightforward functionality and vintage elegance.

Several elements give the 'Old Radium' its charismatic character, starting with the case. With a diameter of 40mm, it can be worn as easily over the cuff as underneath it, proving its worth in all facets of an active lifestyle. While stainless steel would be period-correct, bronze offers a more exciting proposition. Opting for CuSn8 bronze, one of the finest qualities available of this alloy, the case has a warm hue, close to that of rose gold. This alloy is known for being very pure and consists of 92% copper, 7.5-8% tin, and around 0.30% phosphorus. It will develop patina at a lower rate than lesser quality bronze but eventually does reveal its unique look.

The dial is highly legible, as one would expect from a Pilot's watch. It features Isotope's hallmark lacrima in black, featuring a grainy finish just like the area surrounding it. This is placed slightly higher so that there is quite a bit of depth to the dial. The area surrounding the lacrima is available in Ash Grey, Olive Green, and Ox Blood Red, each giving the 'Old Radium' a different touch. The Arabic numerals, as well as the sword hands, are filled in with Super LumiNova in a colour that is reminiscent of the aged radium of vintage watches, hence its name 'Old Radium.' A date window adds another practical touch to this Isotope, which thanks to its black background, blends in nicely with the rest of the dial. The dial is protected by a sapphire crystal which has an anti-reflective coating.

While bronze cases add character to a watch, this unique alloy can also cause allergic reactions when worn directly on the skin for extended periods. To prevent this, the 'Old Radium' features a titanium case back. A sapphire crystal insert allows owners to see the Swiss-made Landeron calibre 24. This rugged movement is the perfect engine for a sophisticated gentleman's Pilot's watch, featuring automatic winding and a power reserve of 40 hours while running at 4Hz/28.800 VpH. The 'Old Radium' is water-resistant up to 10ATM, unique for a Pilot's watch. The finishing touch is the comfortable strap made from an Italian soft calf. It comes with a buckle engraved with the Isotope name made out of CuSn8 bronze alloy.

PLEASE NOTE: For the 1st batch, there are only 12 watches of each colour available to ship now. The 2nd batch will be ready to start shipping in October/November. Once the 2nd batch starts shipping, prices will increase 10%

Technical Specifications

  • Brushed CuSn8 Bronze case, sandblasted Titanium exhibition case back
  • Case diameter 40mm X 47mm (with lugs)
  • Height 10.1mm
  • Anti-reflective crystal sapphire
  • Screw-down crown at 3 o’clock
  • Textured dial with Old Radium luminescent coating applied on numbers and indexes
  • Isotope Brushed Bronze Sword hands applied with Old Radium luminescent coating
  • Water-resistance 100m / 10 atm / 330 ft (Light swim rated)
  • 20mm Quick-release Calfskin strap with bespoke Bronze Brushed Buckle

Swiss Landeron Mechanical Movement

  • Automatic, self-winding
  • Power reserve 40 hours
  • 25 Jewels, 28800A/h
  • Accuracy -12/+12 s/day
  • Decorated, Côtes de Genève, perlage

Caring for your Bronze CuSn8 Isotope

Bronze is a copper alloy and oxidises when in contact with oxygen. The bronze forms a natural patina, which gives your watch a unique character. With time, your Old Radium Bronze will become darker due to oxidation: the patina. This is a natural process and does not indicate quality issues.

Bronze is a living alloy and it's not hypoallergenic - data suggests that more than 10% of the world population is known to be allergic to nickel. Therefore, a bronze watch case may irritate your skin.

Hands-on Review by TimeToGo

Hands-on Review by Worn And Wound

Ordering from and outside the U.K.

If you’re not based in the U.K. you'll probably need to pay import tax/duty when buying a watch (or any product) from Isotope Watches and other U.K.-based brands

Brexit changed the rules and since the 1st of January 2021, this also includes all countries within the European Community.

Prices within the U.K.

For customers in the U.K., all watches/products are priced including 20% of U.K. VAT.

As an example, if our watch is priced at £1,000, U.K. customers will need to pay £1,200 (£1,000 + £200 (20% VAT)

Prices outside the U.K.

For customers based outside the U.K., all watches/products are priced excluding U.K. VAT.

Your IP address will determine the prices you see on our website, but if for any reason you see prices including U.K. VAT, the prices will be updated at checkout, depending on your shipping address.

Isotope Watches Limited will not charge VAT when exporting, but you will certainly be asked to pay import duty and/or tax/VAT by your customs country.

How to pay for import duty/tax

We ship most of our products/watches via DHL Express. As per customs request, DHL will calculate the duty and taxes and they will collect the payment on behalf of your country's customs.

Neither Isotope Watches Limited nor DHL has control or profit over these costs/taxes.

How much do I need to pay in duty/tax to receive my watch?

It depends on the country you are based in.

Please see the examples below based on a £1,000 watch. These values are only a reference as they vary depending on the watch cost, and they might not be updated.


Within the U.K.

20% tax (GBP 200), is included in the price.

0% duty (GBP 0.00) + 0% DHL's handling fee


European Comunity Countries

Approx. 15%-24% tax (GBP 150 – GBP 240)

0% duty (GBP 0.00) + DHL's handling fee



10% tax (GBP 100)

0% duty (GBP 0.00) + DHL's handling fee



5% tax (GBP 100)

0% duty (GBP 0) + DHL's handling fee



5% tax (GBP 50)

8% duty (GBP 80) + DHL's handling fee



13% Tax (GBP 130)

20% Duty (GBP 200) + DHL's handling fee



10% tax (GBP 100)

5% duty (GBP 50) + DHL's handling fee


South Africa

15% Tax (GBP 150)

0% Duty (GBP 0) + DHL's handling fee


United Arab Emirates

5% tax (GBP 50)

5% duty (GBP 50) + DHL's handling fee


If you have any questions, please don't hesitate to email us: info@isotopewatches.com

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