Extra large, an extra large date display—and extra blue: we call it siren blue, inspired by summer skies over the Côte d’Azur on hot August days. And for everything else, come what may: automatic watch Ahoi date siren blue holds tight to 20 atm, tells the time even in the dark, and looks great with a bathing suit, sneakers, or a suit.
Specifications
- Ref.
- 554
- Case
-
stainless steel
sapphire crystal glass back
fixed with six screws; screw-down crown, crown guard
- Glass
- domed sapphire crystal glass
- Winding
- automatic
- Dimensions
-
diameter
40.3 mm
height 10.6 mm
lug-to-lug 51.0 mm
- Water resistance
- 20 atm (suitable for diving)
- Dial
- siren blue, hour indexes with blue superluminova
- Hands
- rhodium-plated, with superluminova inlay in white, seconds hand neon orange
- Strap
-
Textile strap blue-black, woven, waterproof
lug width 20 mm
- Clasp
-
Winged clasp, square, stainless steel
Caliber
This automatic caliber boasts an outstanding winding rate and excellent accuracy; it is equipped with the patented NOMOS date mechanism and a great deal of tradition— such as beautiful polishings that are unique to Glashütte.
- Caliber
-
DUW 5101
automatic
- movement height
- 4.3 mm
- diameter
- 13 ¾ lines (31 mm)
- Power reserve
- up to 42 hours
- Jewels
- 26
Beautiful things


Outstanding materials
Designed in Berlin, elaborately produced, and polished by hand, the NOMOS winged clasp exudes elegance through its beautiful minimalism.
The textile strap is tailor-made for NOMOS Glashütte in France. It sits comfortably on the wrist—and as elegant as it is, this strap is (of course!) also suitable for a swim.

Beautifully presented
Our automatic timepieces come in an elegant leather wallet—the perfect companion for weekend trips and world tours. The black, full grain leather is wonderfully soft and protects your timepiece beautifully.