Stainless steel OMEGA Speedmaster 'Mark III' automatic chronograph. Made 1973

Information

• Brand: OMEGA 
• Year: 1973
• Model: Mark III
• Reference: ST 176.002
• Calibre: 1040
• Movement: Automatic
• Material: Stainless steel
• Features/complications: Chronograph and pilot line case
• Dial: Black matte dial with luminous painted baton indexes, outer minute/seconds divisions, outermost 1/5 second divisions featuring central 60 minutes counter (the ‘jet’ hand), a central ‘stopwatch’ hand counting a minute in 5ths of a second, a 12-hour counter at 6 o’clock, a double counter at 9 o’clock and date aperture at 3 o’clock. The double counter at 9 o’clock consisted of a continuous second’s counter and a 24 hour dial showing day or night.
• Case dimensions: 43.5 x 41mm
  
• Bracelet/strap: Stainless steel bracelet
• Accessories: Extract from the Archives
• SKU: 03163

Essay

The Speedmaster Mark III automatic chronograph with a calibre 1040 was launched by OMEGA in 1970 and became their first automatic chronograph.

The calibre 1040 was developed together with Lemania and consisted of a central rotor winding automatic chronograph, with a diameter of 13 3/4 lines and a height of 8 mm. Due to the thickness of the movement a large case was built to house the movement.