This watch cuts an exquisite figure on the beach, as the screw-down back and crown ensure it stays water-resistant—down to 200 meters. Ahoi also comes with an exceptionally elegant blue-black textile strap. An orange hand keeps track of the seconds and a splash of light blue makes playful references to the summer, while the luminous hands and indexes tell the time, even in the dark.


stainless steel, bipartite; domed sapphire crystal glass; diameter 40,3 mm; steel back: height 10.54 mm; sapphire crystal glass back: height 10.64 mm; fixed with six screws; screw-down crown, crown guard; new engraving on the back: a little whale next to “20 atm”, meaning that this watch is extra water resistant

galvanized, white silver-plated, hour indexes with superluminova (green luminescence)

hour and minute hand rhodium-plated and with superluminova inlay in light blue (green luminescence), seconds hand neon orange

blue-black textile strap with winged clasp, lug width 20 mm

to 20 atm (DIN 8310)

Reference number
555, 550 (with sapphire crystal glass back)


ε (Epsilon)—in-house built NOMOS caliber with automatic winding

13 ¾ lines (31 mm)

Movement height
4.3 mm

Power reserve
approx. 43 hours

Decentralized seconds, stop-seconds mechanism, Glashütte three-quarter plate, 26 jewels, Glashütte stopwork, bidirectional winding rotor, Incabloc shock protection, balance spring from Nivarox 1A, adjusted in six positions, tempered blue screws, rhodium-plated movement surfaces with Glashütte ribbing and NOMOS perlage, ratchet and duplex wheel with Glashütte sunburst

More watches

To date, NOMOS Glashütte has released twelve watch models and four collections totaling about ninety different versions. There are thus many more watches to discover—find a selection here.