SORNA Montre en acier, faisant chronographe, la lunette … | Drouot.com
La Cote des Montres : Enchères Sorna Watch, Grenchen, Ref. 2692. Produced in the 1970's. World Time, water-resistant, "tonneau bombé", stainless steel gentleman's wristwatch with date, round button chronograph, register, tachometerand telemeter.