ZENITH Ref. A788

ZENITH EL PRIMERO A788 Zenith, Chronograph, automatic, El Primero, case no. 057E366, ref. A788. Made in the early 1970s. Fine and rare, tonneau shaped, self-winding, water-resistant stainless steel wristwatch with round button chronograph, registers and date. C. Two-body, polished and brushed, flat bezel, hooded lugs, screw-down case back. D. Blue with applied luminous steel baton indexes, outer minute and 1/5th seconds divisions, subsidiary silver guilloché dials for the seconds, the 30-minute and 12-hour registers, aperture for the date between 4 and 5. Luminous steel baton hands. M. Cal. 3019PHC, rhodium-plated, 31 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, index regulator. Dial, case and movement signed. DIAM. 37 mm. THICKNESS 14 mm.