![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 #
![SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83 SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83](https://watches83.com/65782-thickbox_default/seiko-hexagon-vintage-automatic-chronograph-watch-ref-6139-7080-japan-a-cal-6139-precious-.jpg)
SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83
![SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83 SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83](https://watches83.com/65766-thickbox_default/seiko-hexagon-vintage-automatic-chronograph-watch-ref-6139-7080-japan-a-cal-6139-precious-.jpg)
SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83
![SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83 SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83](https://watches83.com/65765-thickbox_default/seiko-hexagon-vintage-automatic-chronograph-watch-ref-6139-7080-japan-a-cal-6139-precious-.jpg)
SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83
![SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83 SEIKO HEXAGON Vintage automatic chronograph watch Ref. 6139-7080 JAPAN A Cal. 6139 *** PRECIOUS *** Seiko Vintage watches - Watches83](https://watches83.com/65762-thickbox_default/seiko-hexagon-vintage-automatic-chronograph-watch-ref-6139-7080-japan-a-cal-6139-precious-.jpg)