Portal:Anniversaries/January 21

2013 — A. Lange & Söhne introduces the 1815 Rattrapante Perpetual Calendar at SIHH; it would win both the Grande Complication Prize and Public Prize at the Grand Prix d'Horlogerie de Genève later that year

2013 — Omega announces Cal. 8508, the first watch movement anti-magnetic to 1.5 Tesla (15,000 gauss).