The Seiko 6309-7040 is an iconic vintage automatic dive watch, produced from 1976 to 1988, widely recognized by collectors for its distinctive cushion-shaped case (earning it the nickname
Specifications
SKU
02032026173411
Item
Wristwatch
Brand
Seiko
Model
Turtle
Reference
6309-7040
Year
Dial Color
Black
Case Material
Steel
Movement
Automatic
Caliber
6390A
Country
Japan
Gender
Men's
Jewels
17
Grade
Band Material
Functions
Type
Department
Balance
Condition
Overall Condition
Fair, overall condition
Case
Shows desk marks and light scratches.
Crystal
Shows hairline scratches.
Crystal Condition
Dial
Crown
Shows desk marks.
Crown Condition
Hands
Hands Condition
Band
Black Rubber Diver Style
Function
Running, but may be in need of service. This means, it can run unreliably, start or stop and timekeeping is not guaranteed
Winding
Timing Data
Gaining 31 Seconds a day, amplitude 170, beat error 0.0
Additional Notes
Measurements
Diameter
44mm
Dial Diameter
Width
Length
Height
Thickness
13mm
Lug Width
22.5mm
Lug to Lug
46mm
Bracelet Size
Inside Diameter
Outside Diameter
Inside Width
Inside Length
Outside Length
Outside Width
Band Width
Band Clasp Width
Band End Link Width
Band Length
Box Length
Box Width
Size
Standardized Size
About the Brand
Seiko: A beloved brand among collectors, Seiko has long been known for offering exceptional watches at accessible prices. Founded in 1881, the Japanese brand earned worldwide recognition for its divers, sports chronographs, and industry-leading quartz technology. With a lineup that includes historically significant and technically innovative pieces, Seiko remains one of the most widely collected and respected watch brands across all price points.