====== Nomos Ahoi Datum ======
{{wst>image_cr|Nomos|Ahoi Datum}}

{{wst>image_r|Nomos Zeta|Self-winding manufacture calibre Nomos Zeta\\ © [[Nomos]]}}

**Ahoi Datum** ("Date" in English) is a waterproof wristwatch with [[date]] produced by [[Nomos]] produced since [[2013]]. It is part of the larger [[Nomos Ahoi]] model range.

===== Overview =====
In [[2013]] Nomos presented the new [[Nomos Ahoi|Ahoi model line]], which is waterproof up to 200 m and thus well suited for swimming. It has a similar case and dial to the existing [[Nomos Tangente]] and [[Nomos Tangomat|Tangomat]] with the notable addition of [[crown guard]]s. In fact, the Ahoi model reference numbers are in the same range (550) as the Tangente (500).

The initial Ahoi models were [[Nomos Ahoi|a simple automatic]], using the [[Nomos Epsilon]] movement, and a Ahoi Datum ("date") model using the [[Nomos Zeta]]. These models moved to the [[DUW 5001]] and [[DUW 5101]] in [[2018]], using the [[in-house]] [[Nomos Swing System]].

The Ahoi Datum has been produced in various [[colorways]], including [[Nomos Ahoi Atlantik|Atlantik]] blue and lighter signalblau ("siren blue"). Most models feature a [[sapphire]] [[display caseback]] but one reference, model 556, has a solid steel back.

The Ahoi was recognized first place in the category "men's watches" by the watch magazine [[Armbanduhren, watch magazine|Armbanduhren]] in [[2014]]. It also won the iF product design award that year. The Ahoi Datum was awarded the [[Goldene Unruh]] at [[MunichTime]].

===== See Also =====
  * [[Nomos Ahoi]]
  * [[Nomos Ahoi neomatik]]


<WRAP ud ud_mod>

**Reference:**
  * Ref. 551 Ahoi Datum
  * Ref. 553 [[Nomos Ahoi Atlantik|Ahoi Atlantik Datum]] Dark blue dial
  * Ref. 554 Ahoi Datum signalblau ("Siren Blue") steel case back
  * Ref. 556 Ahoi Datum steel case back

**Movement:**
  * [[Self-winding]] [[manufacture movement]] [[Nomos Zeta]] or [[DUW 5101]], 21,600 A/h
  * [[Balance spring]] in Nivarox 1A
  * [[Three-quarter plate]]
  * 26 [[jewels]]
  * [[Incabloc]] [[shock protection]]
  * Movement surfaces rhodinated with [[Glashütte stripes]] and Nomos [[perlage]]
  * Ratchet and duplex wheel with [[Glashütte solar grinding]]
  * [[Blued]] screws
  * [[Power reserve]] ~42 h

**Case:**
  * [[Stainless steel]], bipartite
  * Ø 40.3 mm, H 10.5 mm
  * [[Sapphire crystal]]
  * [[Sapphire crystal]] caseback, screwed with six screws
  * [[Screw-in crown]]
  * [[Waterproof]] to 20 atm

**Dial:**
  * Galvanised, white silvered, hour indices with [[Superluminova]]
  * Hour and minute hands rhodinated and coated light blue with Superluminova, seconds hand red lacquered
  * [[Small seconds]] and date display at 6h

**Functions:**
  * Hours, minutes, [[small seconds]]
  * [[Hacking seconds]], date

**Bracelet:**
  * Textile strap black with winged clasp

**Prize:**
  * 3.280 EUR (in 2015)
</WRAP>

{{tag>Watch_models Nomos_models}}