Affordable Vintage: Seiko 6105

Today, we’re excited to bring you the first of hopefully a long series on interesting and largely affordable vintage dive watches by w&w friend, @vintagediver (head over to IG and give him a follow for great pics daily). Enjoy!

6105adSeiko has a rich history in the world of dive watches, and it’s safe to say that none is as iconic as the venerable Seiko 6105-8110/9 (aka 6105-811X). It is the definitive Seiko diver, and it holds it’s own against the other iconic divers of the 1970’s. This is known as Seiko’s 3rd generation diver, following the 6217 (aka 62mas) and the slimmer 6105-8000/9. The 6105-8110 and 6105-8119 are exactly the same, but the last digit in the reference number indicates in which market the watch was originally sold.

The 6105-811X was made from 1970-1977, and came in two slight variations. The early models from 1970 were labeled “water 150m proof” on the dial, and “waterproof” on the case back. At some point later that year, they changed the text to “water 150m resist” with “water resistant” on the back. This was inline with a change in nomenclature throughout the Seiko offerings. The “proof/proof” models are fairly rare, and command a definite premium over the “resist/resist” models.


This watch is one that I think has to be felt “in the metal” to be fully appreciated. Several years ago, before I had any Seiko divers, I saw the pictures and posts of devoted 6105 owners, and was really quite unimpressed. Over the years, the design started to grow on me, and I decided I had to have one, and see what all the fuss was about. Once I had one, it was love at first sight. The 6105 simply has a wrist presence that doesn’t translate into pictures.


The build quality and finishing is exceptional, and definitely on par with other hi-end divers of the same period, like the Omega Seamaster 300 and the Rolex Submariner. Seiko was, and still is, a true manufacture, making everything in-house. Not only was the movement in-house, but Seiko even made their own oils, cases, crystals and such. The 6105 was a very popular choice with US military servicemen in the Vietnam war era, and was available from the PX stores (retail stores found on United States military installations) for soldiers. It was also famously worn by Martin Sheen’s character, Captain Willard, in the Vietnam war movie Apocalypse Now.


The case is a nice chunk of solid stainless steel, with a distinctive asymmetrical cushion shape. The crown is at 4 o’clock and is protected by the bulging crown guard, giving it a very unique and instantly recognizable geometry. The original factory finish is circular brushing on the top and polishing on the sides, with a nice sharp line delineating the two. The oversized crown is about 6.3mm wide, with shallow grooves covering the whole thing and six deep grooves for good grip. It features a “turn and lock” system that is unique to this model. After setting the watch, you push the crown in and turn it while still gently pushing and one of the big grooves will lock onto a pin that keeps the crown from turning. To be honest, I can’t really figure out the benefit of this, but it looks cool!


The crown is signed “->Lock”, which is pretty cool in itself. The case measures about 44mm wide by 47mm long with 19mm lugs. It’s an excellent size for most wrists, not too big and not too small. The shape of the case and case back sit very comfortably on the wrist, making it a very easy watch to wear despite it’s big size and smallish lug spacing. The coin edge bezel with aluminum insert rotates bi-directionally, and has a click ball mounted in the case that gives it 60-clicks in a full rotation. A rubber O-ring gasket gives it just the right amount of tension for great “bezel action”.  The crystal is a proprietary Seiko hardened mineral glass called Hardlex. It is a double domed type, with a very shallow dome on the outside (almost flat), and a more pronounced inner dome. These were (and are) prone to scratches, and cannot easily be polished. However, NOS crystals can be found, and there are aftermarket repros that can be had as well. Nothing makes a 6105 sparkle like a brand new crystal!


Under that cool Hardlex crystal is a dial that is truly a work of art. It’s a beautiful matte black, with raised applied chrome markers that are filled with the proprietary Seiko lume material. There is a date window at 3 o’clock with a nice chrome frame.  Under the 12 is an applied chrome Seiko logo with “Automatic” printed in silver just below. Above the 6 it is signed “water 150m proof” or “water 150m resist” depending on the model.

The fine print below the 6 should read “Japan 6105-8009T”. There are many horrible fake dials out there, and lately there have been some very good fake dials showing up. The hour and minute hands are lume filled faceted steel baton style, while the second hand is a unique “stop light” style with two lume filled holes at the tip. The distal one is white lume like the hour and minute hands, and the proximal hole has a pale red color.


The 6105 is powered by the robust Seiko caliber 6105B, a 17 jewel full rotor automatic that runs at 21,600 bph. It is not hand windable, but the automatic winding mechanism is so efficient that one flick of the wrist will start it running from a dead stop. One nice touch that is not often found in Seiko divers (vintage or modern) is that this movement hacks, meaning the second hand stops when the crown is pulled out.

This model originally only came with a rubber strap. There has been some discussion about bracelets being available as OEM from PX stores, but as far as I know this hasn’t ever been proven. The original rubber straps available were the XGL731, the ZLM01, and a third unmarked model. These original straps are quite rare today, and command huge prices when found. The strap on the 6105 in the pictures shown here is an XGL731 that I was lucky enough to acquire. It is incredibly soft and supple, much more comfortable than most modern rubber straps. The ZLM01 strap, otherwise known as a “waffle” strap due to its distinctive pattern, has been reproduced, and is available for those that want the OEM vintage look with a modern material strap.


The 6105 has become probably the most recognizable and iconic of all the Seiko divers, which is saying something coming from a manufacture that is rich in dive watch history. While it is by no means scarce, it is indeed difficult to find in good, original condition. This was intended as a tool watch, and was generally worn as such by the folks lucky enough to have bought them new. They were rode hard and put up wet, so to speak, more often than not.


Most original examples that are found on eBay have moderate to significant wear. The lume material is prone to getting what is commonly referred to as “black funk” on it. For some reason, the Seiko lume used tends to get this black growth on it when exposed to moisture intrusion, which is a bummer as it can’t really be removed (I’ve tried!). Another pitfall in collecting the 6105 is that they are often found with any number of aftermarket parts installed, most often fake dials/hands and replacement bezel inserts.

While these aftermarket parts have their place in restoring what many would consider unwearable condition watches, it can be problematic for those that don’t know the telltale signs and are looking for an all-original example. That said, original, unmolested examples of this fine diver can be found with some patience and perseverance. Trust me, it’s worth the effort to acquire one!

Images from this post:
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Christoph (Instagram’s @vintagediver) is a long time collector and lover of all things vintage, starting with comic books when he was a kid (he still collects them). His passion for watches began in 1997 when he was gifted a family heirloom vintage Omega Genève by his step-father. That started him on the watch collecting path—buying and selling vintage watches of all sorts, with a special appreciation for vintage dive watches and Seiko.

25 responses to “Affordable Vintage: Seiko 6105”

  1. Gareth says:

    Beautiful watch! Vintage Seiko’s don’t get as much love as they deserve.

    • BJS314 says:

      Vintage Seiko’s are wildly popular. There are hundreds for sale everyday. But as the author suggests, you should know if your goal is a completely original model, which can run from $500 into the thousands, depending on the make, or a restored one which can still run between $250-1,000 depending again on the make.

      The right vintage Seiko climbs out of the “affordable” category real quick. lol

      Once you know what you’re looking for, you can distinguish between OME, period accurate aftermarket parts or just shoddy work.

    • Well said BJS314!

  2. Josh says:

    These have been growing on me. The case design is really great, especially with the way the crown guards are incorporated into it.

  3. Li Wang says:

    Excellent overview of an iconic watch. What’s so cool about the 6105 is that there is truly nothing else out there that is quite like it, meaning its design is unique but not trying to be different for the sake of design distinction. Form does follow function – one of the fundamentally appealing aspects of collecting Seiko divers. It’s an instrument that looks cool. Can you do an overview of the 7549 Tunas too?

  4. Bradford says:

    pretty excited for this series, love a good vintage watch, and this article is a great start

  5. Will F. says:

    This is pretty obviously where the Raven Deep Tech gets it’s hands from (hour and minute), an awesome reference back to a great vintage watch.

  6. centerline says:

    On the hunt for a good 6105 a few years ago, I got distracted. I know modifications tend to really polarize Seiko fans… but I love aspects of both the 6105 and the 6309 (not to mention I’m a sucker for anything with a GMT hand), so when this very odd hybrid Seiko showed up, I was smitten. Not “correct”, but I really enjoy it.

    Looking forward to more of this series.

  7. Camille says:

    Great article.

  8. RICKY says:

    do you sell this watch?

  9. Christian Young says:

    What’re the straps that were photographed in thus article?

  10. Gary Hughes says:

    So glad I discovered Worn and Wound. I just discovered my all original Seiko 6105-8119 (broken waffle band) in the attic yesterday; A high school graduation gift from my father in 1972. Still runs like a top!

  11. tobrob says:

    Hello all 🙂

    Please here is a picture have the 3 rubber Strap
    On the Martin Shhen’s Movie !

  12. RogerTurner says:

    Hi I am looking for parts to replace the barrel wheel and the top plate of a 1973 Seiko 6105-8110. Can anyone advise where I might get them or failing that, a replacement movement? Thanks Roger

    • Anthony Kleeman says:

      Roger, genuine Seiko parts for 6105’s can still be sourced on EBay it just takes some patience and consistency, happy hunting.

  13. kelwen says:

    i recently acquired a 6105-8119 in need of some T.L.C. its in pretty good condition except it does not work (25+ years in a drawer), the arms have lost most of their color and the “seiko” on the face has blackened. any advice on prudent actions to take in restoring it and still keeping as original as possible? though I am less concerned with its financial value as opposed to its sentimental. thanks.

    • Anthony Kleeman says:

      Kelwen – there are several very reputable watchmakers that have a very good track record on working on these classics.
      Two that I can fully recommend are Jack at International Watch Works (USA) and Duncan ‘The Watch Bloke’ (UK), both of these guys have long records of producing high quality restorations, if I were you I would send an email to them and probably some photos of the watch and get some estimates on the cost.

  14. ajp3 says:

    I bought my 6105 in 1968 on leave to japan. works today just like it did in 68.

  15. Jack B. says:

    I bought mine at the First Marine Division PX in Danang in 1969. It’s been with me ever since and still runs like a champ.

  16. Joe Rarrat says:

    Hi I have a Seiko 6105 – 8119 and is in need of a major repair due to worn parts. Any suggestions of who and where i can sent it for repair that would have parts?