VINTAGE SEIKO CHRONOGRAPH DAY DATE 6139 8020 | eBay
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 #
Seiko 6139 Chronographs Full List | Vintage Watch Inc
Seiko - Chronograph - Blue eye - 6139-8020 - Men - 1970-1979 in Turkey