Seiko's 6139 was one of the first automatic chronograph movements ever produced, beating Heuer and Breitling who were both racing to accomplish this feat.

Brand: Seiko
Reference: 6139-7069
Movement: 6139
Case: Stainless steel
Size: 40.5mm
Lug to lug: 44mm
Year: 1974
Strap: Seiko bracelet
Box/papers: No
Location: Los Angeles
Price: $999 or make me an offer :)
Web/IG: keepiece.co

Pictures: https://imgur.com/a/GRBfQVT
Timestamp: https://imgur.com/a/M2RRDyQ

CONDITION & SERVICING
-The beautiful matte dial is in excellent condition.
-The case is in good condition, not showing any notable damage.
-Serial and reference numbers are both visible.
-Hands and markers are in good condition, both showing matching lume patina.
-Service history is unknown.