Seiko 5 Sports Speed Timer Ref. 6139-7050
 
Dial: Seiko original green dial with chronograph subdials at 6. bar index with inner bezel
Movement: Automatic mechanical chronograph (cal.seiko 6139) 21 jewels
Manufacture area: 1973
Crystal: mineral
Case metarial: Stainless Steel 
Case Diameter: 38mm (excludes crown)
Crown: Push-down and One Chronograph pushers at 4 and 2 is for rotating inner bezel
Strap: Original Seiko bracelet that fits on 19.5cm wrist
Characteristics: The Seiko Speedtimer 6139 is one of the first automatic chronograph watches ever manufactured in the world