Seiko debuted its 6106-8100 dive watch – like this black-dialed variant from 1968 – in 1967 as its first “Sport Diver.”  The Seiko 6106 is classic vintage Seiko for several good reasons, but onto one of the best features of the 6106 – the dial.


These dials, regardless of variant color, sparkle in the light and were finished better than many of the Swiss watches from the same period.  This is coupled with little writing on the dial, rendering a dial that’s purposeful and sparse, finished with Seiko’s famous Suwa logo.  Once you add the case-colored bi-directional bezel, which flows well into the radial polished case, you have a nicely elegant and simplistic dive watch.


As noted by Worn&Wound, Seiko’s marketing ads boasted about the 6106’s diving capability, that was “Proof," all the way down to 229 feet!  Other ads made it seem like the choice for surfers.  Either way, it was a popular offering and the affordable, but not cheap at the time, price of $75.

This Seiko Sport Diver automatic comes with a leather strap, nylon NATO strap, spring bar tool, and Pelican travel case.

1968 Seiko 6106-8100 Proof/Proof Automatic Sport Diver

  • DIAL: Original Seiko-signed dark gray “proof” dial.  Day/date at 3 o’clock position works nicely.  Slight patina near the one o'clock postion, and the "o" on Seiko is slightly off.  Lume is in quite nice shape, considering the watch is a half century old.


    CASE: Original 38mm x 45mm stainless steel case in pre-loved condition.  Matching original “proof” caseback.


    CRYSTAL: Original acrylic crystal, scratch-free.


    BAND: Black 19mm leather strap, along with a dark blue and gray nylon NATO strap - both feature stainless-steel hardware.


    MOVEMENT: Original Seiko 25-jewel 6106 automatic movement, manufactured in June 1968.


    CROWN: Original recessed unsigned stainless-steel crown.