ZENITH 18k yellow gold El Primero Chronometre gents wristwatch with chronograph, Switzerland around 1992, self winding, reference 30- 0380.400, solid gold case including leather strap with gold-plated original buckle, snap on case back, silvered dial with tachometer graduation, gilded hour-indices, gilded hands, date, rhodium plated movement calibre 400, 31 jewels, precision adjustment, gold-plated chronograph-wheels, diameter approx. 40 mm, original chronometer certificate, condition 2 -3, property of a collector