U-Boat Darkmoon Oil Immersion Men’s Red Watch

U-Boat Darkmoon Red Glass Ref. 8465/B is inspired by the dark side of the moon, combining U-Boat’s oil immersion technology with a striking red-treated sapphire crystal to deliver enhanced legibility and bold visual impact.

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

The 45mm stainless steel case is completely oil-filled to maximise clarity and depth, complemented by a left-positioned crown and domed sapphire crystal with special red colour treatment. Finished with a durable black vulcanised rubber strap and steel buckle, this Darkmoon delivers bold presence with unmistakable U-Boat character.

Questions & Answers

• What makes this Darkmoon model unique? The combination of oil immersion technology and a red-treated sapphire crystal.
• What movement powers this watch? It uses the Swiss Ronda 712.3 quartz movement lubricated in an oil bath.
• Is the dial easy to read? Yes, the oil-filled case enhances legibility and contrast.
• 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.