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The Encyclopedia of Horology

Wristwatch · Diver's watch

1969 Seiko Automatic Diver (Ref. 6105-8000) "Proof / Proof"

Partially verified

This Seiko automatic diver's wristwatch, reference 6105-8000, dates to 1969. It features a stainless steel C-shaped case measuring 41 millimeters in diameter, with a crown positioned at 4 o'clock to minimize potential interference. The dial is matte black with luminescent markers that have acquired a medium grey patina over time. The watch is powered by an automatic movement and is equipped with a rotating dive bezel featuring a luminous pearl at the 12 o'clock position. The case back is marked "Water Proof." The timepiece is paired with an aftermarket Uncle Seiko rubber tropic strap. The watch shows signs of age consistent with its use as a diving instrument, including polishing and surface wear to the bezel. It is currently reported to be in functional timekeeping condition, though its specific maintenance history remains unknown to the current vendor.

Frontal view of the Seiko Ref. 6105-8000 dial and bezel.
Frontal view of the Seiko Ref. 6105-8000 dial and bezel. — Craft & Tailored. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
craftandtailored.com
Category
Wristwatch · Diver's watch
Maker / attribution
Seiko
Reference
6105-8000
Catalogue / lot identifier
SKO61058000-2
Source-reported date
1969
Source-reported place
Japan
Source-reported serial
91XXXXX

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Bezel

The watch is housed in a stainless steel, C-shaped case measuring 41 millimeters in diameter. It features a crown placed at the 4 o'clock position, a design choice intended to reduce the risk of the crown catching on external objects. The exterior shows evidence of past polishing and general wear consistent with its age and intended use as a diving watch.

The bezel is finished in black and shows honest wear from use. A luminous pearl is set at the 12 o'clock position, which has developed a degree of patina. The stainless steel case back is marked "Water Proof" and retains its factory markings.

Evidence for this section
  • “The C-shaped case measures 41 millimeters and is in excellent condition, showing signs of gentle polishing in the past and honest signs of use.”
  • “It features a substantial steel crown set at the 4 o'clock position”
  • “The original "Water Proof" case back shows light signs of use with all of the factrot text and markings remaining present”

Dial and Hands

The watch features a matte black dial. The hour markers have aged to a medium grey tone, and the hands exhibit a similar aging process, appearing slightly lighter than the dial markers. The dial includes a date window positioned at 3 o'clock.

Under ultraviolet light inspection, neither the dial markers nor the original hands show signs of degradation. The dial is described as being in overall good condition, with no notable damage despite the presence of subtle aging.

Evidence for this section
  • “The gorgeous matte black dial is in great overall condition, showing subtle aging”
  • “The markers show light aging, and the lume has aged to a medium grey coloration”
  • “The original hands have aged a few shades lighter than the dial and exhibit no degradation under UV light inspection.”

Condition and Maintenance

The auction description reports that the previous service history of the movement is unknown, and the watch is sold without any accompanying accessories or documentation.

The watch is presented on an Uncle Seiko rubber tropic strap. All factual inscriptions on the case back remain legible.

Evidence for this section
  • “The watch is keeping time, the previous service history is unknown.”
  • “The watch will come supplied on an Uncle Seiko rubber tropic strap.”
  • “The original "Water Proof" case back shows light signs of use with all of the factrot text and markings remaining present”

Open research questions

  • What is the specific movement caliber used within this serial range?
  • Can the production date be further narrowed within the 1969 calendar year based on the full serial number?

Source evidence

Recorded claims and source quotations for 1969 Seiko Automatic Diver (Ref. 6105-8000) "Proof / Proof"
FieldSource-reported valueSource quotation
BrandSeiko“Brand Seiko”
Reference6105-8000“Model 6105-8000”
Serial91XXXXX“Serial 91XXXXX”
Year1969“1969 Seiko Automatic Diver (Ref. 6105-8000)”
Case Diameter41mm“The C-shaped case measures 41 millimeters”
Case MaterialStainless Steel“Material Stainless Steel”
Dial ColorMatte Black“Dial Matte Black”

Visible details

  • Crown at 4 o'clock position
  • Matte black dial with date window at 3 o'clock
  • Rotating bezel with luminous 12 o'clock pearl
  • Uncle Seiko branded rubber strap

Research qualifications

  • Previous service history is unknown
  • Extent of case polishing prior to current acquisition is unverified

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

ساعت مچی سیکو Seiko Automatic Diver رفرنس 6105-8000 مدل ۱۹۶۹

Reviewed 2026-11-02 · Record e7b88551de

Terms in this record

Glossary explanations for terms named in this object’s record.

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