u-boat night vision watch

This wristwatch conceals its dial behind a dark red filter that gives it a bold look that’s unlike any other watch I’ve seen.

The hands and numerals on designer Italo Fontana’s U-Boat Night Vision watch are actually yellow instead of white to enhance readability behind the deep red glass. The crystal itself isn’t red though. There’s actually a hardened K1 mineral glass crystal which sits beneath the red layer, and you can actually remove the colored filter by unscrewing a stainless retaining ring.

Read about it in TechnaBob