Ahoi Datum Doctors without Borders Germany

Nomos Glashütte · Ahoi
- Lug width
- 20 mm
- Case diameter
- 40 mm
- Reference
- 551.S2 (aka: Ärtze ohne Grenzen)
- Family
- Ahoi
- Year
- 2020
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 40 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.
mm
Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- With a 40 mm case on a 20 mm lug width, any 20 mm band fits without adapters.
Other Ahoi references
- Ahoi550
20 mm - Ahoi Datum Chronometer WatchTime551.S1
20 mm - Ahoi555
20 mm - Ahoi Atlantik Datum553
20 mm - Ahoi Atlantik Datum / Closed Back548
20 mm - Ahoi Neomatik 38 Sand / Closed Case Back517
20 mm
Same lug width, other Nomos Glashütte lines
- Tangente Neomatik 41 Update 115 Jahre Rüschenbeck180.S1
20 mm - Tetra Neomatik 39 175 Years Watchmaking Glashütte Off White421.S1
20 mm - Club Sport Neomatik 39 Indian Summer - Smoke / Closed Case Back763
20 mm - Club Sport Neomatik 39 Indian Summer - Tabac / Closed Case Back759
20 mm - Zürich Weltzeit Topper Edition805.TO
20 mm - Ludwig Automatik Datum Anthrazit272
20 mm
Vintage Brown Calfskin Strap — Natural Patina
Hammered calfskin strap in cuoio
Grey Hammered Leather Strap with Ecru Stitching
Red Suede Strap with Stitching — Milano Straps
Natural Calfskin NATO Strap