A Gold Plated Steel Ref. 769 Slide-Rule Chronomat Chronograph Wristwatch, Breitling, Circa 1940, 35.00 mm case diameter, matte silvered dial, painted Arabic numerals, inner 1/100ths of a minute chapter ring, outer minute register ring marked at 3, 6 and 9 for phone calls 3-minute increments, blued steel baton hands, center red chronograph second hand, subdials for chronograph minutes and seconds at 3 o'clock and 9 o'clock respectively, bidirectional turning slide-rule bezel with telemeter scale, polished circular case with concave lugs, chronograph pushers, snap on case back, Venus Cal. 175 manual wind 17 jewel movement, black leather strap, steel tang buckle.