6139-8020 Questions About Original Dial & Hands | The Watch Site
Herology on X: "1975 Seiko 6139-8020 “Hexagon” 17 Jewels Chronograph around 39mm wide w/c and 12mm thick which makes this “Speed Timer” much more compact compared to the venerable “Pogue.” 👍👍👍 #Seiko #
1972 Seiko Chronograph ref. 6139-8020 black and blue dial - TIMELINE.WATCH collection