Seiko debuted its 6106-8100 dive watch – like this gray-dialed variant from 1968 here – 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 sparse 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: Seiko-signed dark gray “proof” dial, which shimmers depending on angle.  Day/date at 3 o’clock position works nicely.  Lume is in nice condition, considering the watch is a half century old.


    CASE: Stainless-steel case measures 38mm x 45mm; matching “proof” caseback.


    CRYSTAL: Domed acrylic crystal; scuff marks near eight o'clock position, but otherwise crack-free.


    BAND: Brown leather strap, with stainless-steel hardware; this 6106 also comes with a gray nylon NATO strap.


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


    CROWN: Recessed unsigned stainless-steel crown.