OMEGA (Chronograph / Speedmaster 125 Anniversary ref . 178.0002) circa 1973 Exceptional chronograph created for the 125th anniversary of the brand (1848-1973). Published in 2000 copies. World's first production automatic chronometer chronograph. Barrel-shaped solid steel case with screwed back (with the famous logo), integrated bracelet with original horizontal blades. Black dial, tachymetric bezel screen-printed on the glass, 24-hour dial at 9 o'clock. Date at 3 o'clock and second hand at 6 o'clock, mirage hand for the minutes. White luminescent indexes and hands. Note the number '125' on the top of the raised dial. Movement: Mechanical automatic winding caliber signed OMEGA/Lemania 1041 Swiss. Size 42 x 52 mm. Condition: Very good condition (Omega case).