There exist numerous vintage Seiko divers popular with "Seikoholics" collectors, but none more so than the venerable 6309 series here - a recently full serviced 1981 Seiko 6309-7049 automatic diver. 

The 6309 series of diving watches was the third generation of Seiko’s recreational/professional divers.  The 6309 line replaced the 6105 in 1976 and was produced until 1988, when Seiko replaced it with the 7002 diver.  6309’s were a successful effort by Seiko to improve the 6105 movement, which allowed for greater lifespan, robustness, and ease of maintenance – not to mention they look great on the wrist.
 
The 6309 line was produced in two separate case variations: an earlier cushion case, popularly known as the “turtle” for the appearance of its cushion case, which was produced between 1976-88 (offered for sale here), and a slimmer case version from 1982-88.
 
The 6309 was popular with the U.S. military, akin to the Seiko model it replaced, the 6105 - its (much more expensive) forefather - and quickly became the staple of the working diver.  The 7049 was designated for the North American market, and the 7040 was for the Japanese Domestic Market (JDM) and the rest of the world.

This Seiko 6309 diver comes with an aftermarket stainless-steel bracelet, nylon NATO strap, Pelican travel case, and springbar tool.

1981 Seiko 6309-7049 Automatic Dive Watch

$0.00Price
  • DIAL: Original black Suwa-signed dial, with limited fading of dial font, and lume patina on the dial hour indicators and handset.  Red dial font in "water resist" mostly remains, uncommon for these.  Spanish/English day variants and date functions at the 3 o'clock position work well as designed, with the deeper bevel on the day/date window (a correct indicator of an earlier model 6309).  Original hands, with a hint of patina, and lume shines following exposure to bright light.

     

    BEZEL: Bi-directional and ratchets with click.  Original bezel insert shows limited wear, impressive given the age of the watch - these inserts are normally first to be damaged when these diver's were used as designed, ie: hard.

     

    CASE: Original hefty 44mm (w/o crown, 44.5mm with) x 45mm stainless steel cushion case, with sharp case lines.  Matching original caseback - the Seiko "wave" emblem is clear and defined.

     

    CRYSTAL: Hardlex 6309-correct crystal,  no scratches.

     

    BAND: This 6309 comes with an aftermarket Seiko-signed stainless-steel bracelet, which will fit up to a slightly eight inch wrist.  It also comes with a nylon NATO strap, with stainless-steel hardware. 

     

    MOVEMENT: Original 6300-series Seiko automatic movement, 17 jewels, manufactured in November 1981.

     

    CROWN: Original screw-down unsigned stainless steel crown, tight as designed.

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