The Seiko 6309 series remains one of the most respected vintage Seiko automatic lines ever produced. Known as a true “workhorse” caliber, the 6309A movement has earned a strong reputation for reliability, ease of servicing, and long operational life. The 6309-8660 reference captures the bold integrated-case styling popular during the early 1980s era.
General Specifications
Brand:Seiko
Series: Seiko 5 Automatic
Reference Number: 6309-8660
Movement: Seiko Caliber 6309A
Type: Mechanical Automatic (Self-Winding)
Jewels: 17 Jewels
Frequency: 21,600 bph (3Hz)
Power Reserve: Approx. 47 Hours
Complications: Day & Date Display with Quickset Function
Crystal: Hardlex Mineral Glass
Case Material: Stainless Steel
Water Resistance: Water Resistant (Vintage Splash Resistance Only)
Production Details
Serial Number: 1N3079
Estimated Production Date: November 1981
Origin: Japan
Design Features
Matte black dial with classic Seiko 5 shield logo
Applied baton hour indices
Day/Date window at 3 o’clock
Integrated-style lug design inspired by late 70s and early 80s aesthetics
Brushed top case finish with polished case sides
Vintage sporty everyday Seiko styling
Bracelet Details
Fitted with aftermarket (AM) stainless steel bracelet
Movement Highlights
The Seiko 6309A movement is widely respected among collectors for its reliability and durability. Featuring Seiko’s famous “Magic Lever” winding system, the movement delivers efficient automatic winding performance and long-term dependability.
Condition
Vintage pre-owned condition
Dial and case show normal signs of age and use
Minor scratches or wear may be present on case and crystal
Original vintage components appear period-correct
Water resistance not guaranteed due to age
Production Era
Late 1970s – 1980s
Important Note
This is a pre-owned vintage timepiece. Please respect vintage watches — minor scratches, aging marks, discoloration, strap wear, or bracelet size limitations are normal characteristics of genuine vintage pieces.
