The Nomos Glashutte NOMOS Tangente GangreserveDatum Gangreserve (Ref. 131), introduced in 2015, is a Steel-cased luxury mechanical wristwatch. The case measures 35 mm. The dial is White. Powered by a Manual winding movement. It wears on a Steel strap/bracelet. On the secondary market, the NOMOS Tangente GangreserveDatum Gangreserve averages $18,502,201 across 1 active listing. When buying pre-owned, check condition grade, box and papers (typically a 10–20% premium), service history, and originality of dial and hands. Use the listings and price history on this page to benchmark fair market value.