Seiko 6139-8020 "Blue Eye" Chronograph (1970s)

Description: Seiko 6139-8020 "Blue Eye" automatic chronograph from the 1970s, one of the first automatic chronograph watches ever produced. Distinctive blue dial with applied indices, 30-minute register at 6 o'clock, date window at 3 o'clock. Stainless steel cushion-shaped case, 44mm. Original Seiko crystal. Rotating bezel. Water resistant to 100m. Powered by the 17-jewel automatic chronograph movement, visible through the exhibition caseback.

Story of This Watch: The 6139 line represents a watershed moment in watchmaking history. When Seiko engineered the first automatic chronograph, they didn't make a prototype or a limited edition, they made this. The "Blue Eye" nickname comes from that unmistakable blue dial & bezel that collectors instantly recognize. Everything works exactly as designed 50+ years later. That's not luck, that's engineering.

Condition: Excellent condition, rated 4/5. Dial is clean & sharp with excellent legibility. Case shows appropriate patina & scratching from 50+ years of wear. Chronograph functions smoothly & reliably. All hands original & in good order. Sapphire crystal clear. Movement running accurately. Recently serviced & fully operational. No polishing. No box or papers.

Good Wrist Co. Assurance: Fully inspected & verified authentic. Reference 6139-8020 confirmed. Movement is original Seiko 17-jewel automatic chronograph caliber. All components original. Recently serviced with full functionality confirmed. Original Seiko crystal intact. Transparent disclosure regarding age-appropriate patina & absent original box & papers.