![Herology on Twitter: "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 # Herology on Twitter: "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 #](https://pbs.twimg.com/media/FUaGBNaWIAA9gzW.jpg)
Herology on Twitter: "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 #
FS: [SOLD] Seiko 1973 Serviced Kanji JDM Automatic 6139-8020 Chronograph watch | WatchUSeek Watch Forums
![Seiko 6139-8020 “BLUE-EYE” CRONO AUTOMATICO VINTAGE CON KIT... for $865 for sale from a Private Seller on Chrono24 Seiko 6139-8020 “BLUE-EYE” CRONO AUTOMATICO VINTAGE CON KIT... for $865 for sale from a Private Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/26816363-nasvss26cz06543q6i7046sh-ExtraLarge.jpg)