ZENITH, REF.1205, EL PRIMERO, YELLOW GOLD.Zenith, Chronograph, Automatic, El Primero, case No..204E219, Ref. 1205. Made in the 1970s..Fine and rare, tonneau shaped, self-winding, waterresistant.18K yellow gold wristwatch with round button.chronograph, reg
C. Two-body, polished and brushed, flat bezel, lapidated.lugs, screwed-down case back..D. Matte white and black, applied gold luminous baton.indexes, subsidiary dials for the seconds, 30 minute.and 12 hour registers, outer minute/seconds and 1/5th.seconds divisions, outermost tachometer scale, aperture.for the date between 4 and 5. Luminous gold and black.baton hands, red luminous seconds register..M. Cal. 3019 PHF, rhodium-plated, 31 jewels, straight-line.lever escapement, monometallic balance, shock absorber.self-compensating flat balance spring, index regulator..Dial and movement signed..Diam. 38 mm.Thickness 13 mm.