1984 Seiko Diver (Ref. 6309-7040)

This Seiko Diver is from the third generation of these incredibly popular watches, which were produced from 1976-1988. The Seiko Turtle came in two references.  The  6309-7049 was produced for the North American market, while the 6309-7040 was produced for Japan and the rest of the world. Measuring 45mm wide and 48mm long, these divers are large watches that are surprisingly comfortable for their size.  The case has circular brushing on top, polished sides and bottom, and is separated by a distinct case line. The screw-down crown is located at the 4 o'clock position for increased water resistance and ease of use. The bezel features a double row of knurling for added grip underwater or when wet and these watches have a very distinct handset that were designed for visibility under any conditions. This example is fitted with a NOS Seiko Hardlex mineral glass crystal, and the Seiko caliber 6309 movement is a 17 jewel automatic that runs forever. The day/date function has a quickset mechanism, making these watches not just rugged, but feature rich and perfect daily driver divers.

This reference can be seen on Ed Harris in the film The Abyss, and Mick Jagger has been photographed wearing his personal example as well. More often than not, these watches were purchased and used for their intended purpose as a diver, which is reflected in the wear and tear most examples display, but this specific example is in excellent original condition.

Stock # SKO63097040
Brand Seiko
Style Diver
Model 6309-7040
Serial 475XXX
Size Men's
Material Stainless Steel
Dial Black
Millimeters 45mm
Bracelet 22mm NATO Strap



The excellent case has been lightly polished in the past and shows honest signs of use while retaining excellent dimensions. The original bezel has achieved a handsome patina through use and retains its luminous pearl at the 12 o'clock position. The mineral glass crystal is clean, free from scratches or wear. The case retains its original screw-down crown. The case back retains all of its original case back engravings. The watch will come supplied on a NATO strap.


The matte black dial is in exceptionally well-preserved condition with no signs of age or damage. The lume plots have a slight ivory patina and feature some light dark spots, which is common, under U.V. light inspection the lume plots exhibit no degradation. The original hands match the dial nicely and display no degradation under U.V. light inspection.


None. The watch is running, previous service history is unknown.