U-Boat Darkmoon Soleil Oil Immersion Men’s Red Watch

U-Boat Darkmoon Red PVD Soleil Ref. 8697/B is inspired by the dark side of the moon, combining a bold red soleil dial with U-Boat’s signature oil immersion technology to deliver intense colour depth and enhanced legibility.

Powered by the Swiss Ronda 712.3 quartz movement, lubricated in an oil bath, this model offers precise and reliable hours-and-minutes timekeeping. The oil-filled construction creates the illusion of an absent crystal, while a visible air bubble compensates for temperature variations, highlighting the Darkmoon’s distinctive engineering.

The 45mm stainless steel case with black PVD treatment is completely oil-filled to intensify colour and clarity, protected by a curved sapphire crystal and complemented by a left-positioned crown. Finished with a durable black vulcanised rubber strap and IPB-treated steel buckle, this Darkmoon delivers bold presence with unmistakable U-Boat character.

Questions & Answers

• What is oil immersion technology? The case is filled with special oil to enhance dial depth, colour intensity, and legibility.
• What movement powers this watch? It uses the Swiss Ronda 712.3 quartz movement lubricated in an oil bath.
• Is the dial luminous? Yes, the hands and indexes are treated with beige Superluminova.
• Is the battery easy to replace? Yes, the locking ring system allows quick battery replacement.
• Is it suitable for everyday wear? Yes, its robust construction and rubber strap make it ideal for daily use.