Heuer. Beau chronographe bracelet en acier de forme carrée avec date mouvement automatique Heuer. A fine stainless steel automatic calendar chronograph square wristwatch Monaco, Ref 1133, Circa 1970Heuer. Beau chronographe bracelet en acier de forme carrée avec date mouvement automatiqueHeuer. A fine stainless steel automatic calendar chronograph square wristwatch Model: MonacoReference: 1133Date: Circa 1970Movement: 17-jewel Cal.12 automaticDial: Blue, applied polished baton hour markers, white outer 1/5th second divisions with red baton five minute markers, subsidiary dials at 3 and 9 for 30 minute and 12 hour recording, date aperture at 6, pointed baton hands with red accents and luminous inserts, red centre chronograph handCase: Brushed and polished square, snap on back, signed crown at 9, twin chronograph pushers at 2 and 4, No.157397Strap/Bracelet: Navy blue and orange racing leatherBuckle/Clasp: Signed steel buckle, FC 5042, stamped F H7Signed: Case, dial & movementSize: 40mm Accompaniments: TAG Heuer service box, spare parts replaced during service including 2 handsThe Heuer Monaco was revolutionary with its square case design and during the same period Heuer started to experiment with square shaped watches, a case maker, Piquerez, showed his new waterproofing system, where four notches clipped into the back of the monocoque case and through tension was able to create water resistance. With this new patented technique, Heuer negotiated with Piquerez for exclusivity. The Monaco would be the first square automatic chronograph with a water-resistance watch case.Jack Heuer searched for a name that would appeal to the chic, high-end crowd that would enjoy the new bold design, racing enthusiasts who would frequent places like Monte Carlo. Heuer had already developed the 'Monte Carlo' stopwatch, a legendary dashboard timepiece used for the 'Rally Monte Carlo' in the works Minis and Porsche 911's. He realized that "" Monaco"" would appeal to the elite market strongly appreciating the revolutionary chronograph.Finally the Heuer Monaco the world's first self-winding rectangular chronograph was introduced with simultaneous press conferences on the 3rd of March 1969, in Geneva and New York. Jack Heuer characterises this as the most important product launch during his career. The newly developed Cal.11 automatic movement used 17 jewels, an unbreakable mainspring, was antimagnetic, and had shock protection, but its most distinctive feature was the placement of the winding crown at the left side. A successful advertising campaign was highlighting that with an automatic chronograph, the user would touch the crown only for time setting.