Vintage Seiko 6139-7020 Speed-Timer from November 1971

A Serviced Vintage Seiko 6139-7020 Speed-Timer from November 1971. This original example retains its factory brush finish (case and bracelet have not been repolished) and shows honest, wearable signs of use. Just serviced by us and running very well.
 
The chronograph functions correctly and resets to zero on both the seconds and minutes hands. Quick-set day/date works as intended, pull the crown halfway to change the date, fully in to advance the day (day wheel displays both Kanji and English).
 
Fitted with its original stainless steel bracelet, total watch and bracelet length is 20 cm. New seals were installed during service, however the watch has not been pressure tested and should not be considered waterproof.
 
Please review the photos and video carefully for a close inspection of condition and wear.