Breitling. An 18k Gold Pilot's Chronograph Wristwatch with Black Dial and Original CertificateSigned Breitling, Navitimer, Ref. 806, Case No. 997'513, Circa 1964 Cal. Venus 178 mechanical movement, 17 jewels, black dial, luminous Arabic and baton numerals, luminous hands, inner double time scale, outer revolving slide rule on a silvered chapter ring, three silvered engine-turned subsidiary dials for 12 hour and 30 minute registers and constant seconds, large circular case, ridge-edged revolving bezel, extended down-turned lugs, two round chronograph buttons in the band, snap on case back, case, dial, and movement signed41mm diam.