Hydrium® Seconde/Seconde/


Tax included only within the UK
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Introducing the limited edition Hydrium Seconde/Seconde/, a groundbreaking Memento Mori watch without a skull.

When José, the owner and ECD of Isotope, approached Romaric to create a watch commemorating the new logo and Isotope's 7th anniversary, Romaric had a different idea.

Instead of simply celebrating the new logo, he wanted to pay homage to the death of the old logo and create something truly unique: a skull-free Memento Mori watch.

Romaric André, the creative mastermind behind Seconde/Seconde/, began his journey in the watchmaking industry in 2019. His passion for vintage timepieces led him to experiment and explore new approaches, gaining international recognition along the way.

The world of horology has always captivated Romaric, and now he contributes to it by telling stories in a distinct and beautiful manner. "I focus on the smallest details, always playing with the DNA of a product without breaking it."

The Hydrium Seconde/Seconde/ is an eccentric representation of the inevitability of death.

As Isotope's original logo made its debut seven years ago, the company's growth and evolution called for a logo adaptation that aligns with the quality and innovation of their designs, embodying elements of Streamline Moderne and the Lacrima, nature's fluid shape.

Romaric's interpretation places his latest creation six feet under, a departure from the typical 1000 feet water resistance of Hydrium cases.

Limited to only 50 pieces, the Hydrium Seconde/Seconde/ features a black matte dial with subtle hints of green.

The arrows transform the logo to read "OTOPSIE" (autopsy) instead of "ISOTOPE." The railway track style chapter ring, "i" hands, and exclusive Failing Heartbeat second hand are filled with Superluminova®, matching the green lacrima on the black crystal sapphire bezel.

Crafted from sandblasted 316L stainless steel, the watch case exudes a sophisticated allure. It comes with a supple and bespoke black calf leather strap adorned with matching green stitches. The movement is a meticulously finished and regulated Swiss Landeron.

The Isotope Hydrium Seconde/Seconde/ is an exclusive limited edition of only 50 pieces and is now available and ready to ship.

Technical Specifications

  • Swiss Made
  • 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 bezel with 120 clicks 
  • Anti-reflective crystal sapphire
  • Screw-down crown at 3 o’clock
  • Black Matte dial and white railway track style chapter ring filled with  Super-LumiNova®
  • Isotope “i” hands and Failing Heartbeat second hand filled with Super-LumiNova®
  • Water-resistance 300m / 30 atm / 1000 ft
  • 22mm Quick-release Soft Black black leather strap with signed micro-blasted Steel Buckle

Swiss Landeron Mechanical Movement

  • Automatic, self-winding
  • Power reserve 40 hours
  • 25 Jewels, 28800A/h
  • Accuracy -12/+12 s/day
  • Bespoke finishing with Perlage and Côtes de Genève

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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