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Seiko 6138 "UFO" Chronograph Wristwatch

Item Details

Brand: Seiko
Type: Wristwatch
Model Name: UFO
Model Number: 6138-0017
Serial Number: 42XXXX
Lug to Lug (mm): 47
Case to Case (mm): 44
Bezel Material: Stainless Steel
Case Material: Stainless Steel
Caseback Material: Stainless Steel
Movement: Automatic, Seiko 61388, 21 Jewels
Functions: Chronograph, Date, Tachymeter Bezel
Bracelet/Fob Material: Stainless Steel
Bracelet/Fob Style: Link
Clasp Style: Fold Over
Total Length: 8.00"
  • Timekeeping accuracy not guaranteed.
  • This item has been evaluated by a Watch Specialist using industry standard testing to ensure metal content and accuracy. All weights and measurements are estimated and approximate​.
  • EBTH assumes all watches unisex and does not specify the gender of a piece. For size reference, please see the case measurements of the piece listed under dimensions.
  • Pre-owned jewelry may contain minor markings/imperfections throughout.
  • While we represent items accurately on our site to the best of our ability, the color calibration of computer monitors can vary, causing colors to appear slightly different from one monitor to another. Due to this, please note that precise color representation of metal and gemstones is not always possible.


- running at time of evaluation without detailed testing, future state not guaranteed. .
- also known as “Yachtman” and “Big Eye – Small Eye”
- day and date window at 3 mark.
- tachymeter scale.
- runs but cannot be stopped.
- scratches to crystal.
- bracelet is an unsigned replacement.

Item #


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