This is a rare men's two tone Breitling "Chronomat" B13050.1 wristwatch.  The watch features a massive circular two-tone case with a screw down water-proof back and crowns with pushers, Serial # B13050.1 133781.  It is attached to a sectional two tone Breitling bracelet that measures 8" long.  The watch is a Cal. 44, rhodium plated, 38 jewel Breitling automatic chronograph movement with a straight-line lever escapement, monometallic balance, topped with an original white painted dial with applied luminous stick indexes, outer tachometer graduation and 1/5th seconds scale, subsidiary dials for the seconds, 12-hour and 30-minute registers and aperture for the date at three o'clock topped with luminous yellow gold baton hands.  As you can see from the photo the watch is in overall very good condition.