Edox Hydro-Sub Date Automatic Chronometer — Blue Dial, 42mm (Ref. 80128-3BUM-BUIO)

The Hydro-Sub is Edox's COSC-certified chronometer diver — a blue-dial, 300M automatic that pairs dive-watch toughness with certified precision.

Part of Edox's Water Champion heritage, the Hydro-Sub houses the automatic Caliber 806 (SW 200 base), officially COSC chronometer-certified for accuracy. The 42 mm stainless steel case is water resistant to 300M / 30ATM, with a sapphire crystal and a steel bracelet. Date function, luminescent hands and a screw-down crown complete a genuine tool watch.

Why collectors choose the Hydro-Sub

• COSC chronometer-certified Swiss automatic (Caliber 806)
• 300M water resistance, sapphire crystal
• 42 mm stainless steel case on a steel bracelet
• Blue dial with date and luminescent hands

What does COSC certified mean? It means the movement passed the Swiss Official Chronometer Testing Institute's precision standard — a guarantee of accuracy few dive watches carry.

Swiss Made. 2-year international warranty. Free shipping across North America. Dealer enquiries: info@edoxwatch.com