Description
Seiko Seikomatic “Weekdater” 6206-8040 | Suwa’s 1960s Automatic Classic
The Seikomatic line was Seiko’s flagship for automatic‑winding mechanical watches throughout the 1960s. Built by Suwa Seikosha, the caliber 62 family represented a major step forward in Seiko’s pursuit of precision and reliability. The Weekdater models, such as this 6206‑8040, combined everyday practicality with refined mid‑century design.
Date: October 1966
Movement: Seiko 6206A automatic
Brand: Seiko Seikomatic 6206-8040
Accuracy: ±10 sec/day (final adjustment before delivery)
Power Reserve: 40 hours
Size: 37.3 × 45.0 mm
Condition:
Dial – Good condition with some wear at the rim below 3 o’clock, retaining vintage character.
Hands – Very good condition, free of scratches or marks.
Crystal – Acrylic replacement.
Case – Well preserved with small marks and hairlines, consistent with age.
Strap – Genuine leather strap.
Service:
Movement fully stripped, cleaned, and serviced for long‑term reliability.
All functions tested and confirmed working.
Delivered with final accuracy adjustment.