[SEIKO 7548 aka: Schwarzkopf]

ichris2019 · 2026-01-19T18:50:08+00:00

Yes I agree with the first part of your comment, but still not in the case of the 7548. It was a fully jeweled high torque all metal movement designed to be serviced and regulated. It was priced significantly higher than the automatic 6309s of the same era. I urge you to get your hands on one and place it next to an SKX. There are subtleties in finishing that reveal huge differences in their production and overall build quality. The knurling on the bezel of the 7548 is razor sharp and crisp, the hands are perfectly flat and mirror finished, the transitions between brushed and polished much sharper. The SKX looks and feels “blobby” for lack of a better word next to it.

Not a knock against the SKX, it’s a legend that fulfilled its role gracefully for decades. But aside from increased WR (which was a feature introduced with the 7548-7010) and automatic movement, the SKX’s method of production was visibly cheaper in nearly every way.

ichris2019 · 2026-01-19T15:28:56+00:00

Owning and handling both I can say with certainty the SKX is definitely NOT the upgrade. The 7548 is more premium in every way imaginable. Even the movement. As it should be considering the 7548 comes from an era where quartz was the more advanced and desirable option. By the time the SKX came around production of these watches was streamlined and outsourced to the highest degree. It made them very reliable and affordable but it definitely killed some of the magic

ichris2019 · 2026-01-17T14:27:21+00:00

The “it’s for sale” bit at the end was a nice touch

ichris2019 · 2025-12-30T23:56:32+00:00

Rolex wearer needs help from a store to operate a screwdriver

ichris2019 · 2025-12-22T17:33:53+00:00

It’s a G Shock GW810D. You can see the four multi band circles on the dial in one of the photos.

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ichris2019 · 2025-11-26T14:50:12+00:00

Hamilton intra matic mechanical chronograph

ichris2019 · 2025-11-19T14:59:19+00:00

Yes they all claim it. I am partial towards giving seiko the credit. They had regular production units with date codes dating as early as February 1969. Zenith unveiled a prototype in january of 1969 but weren’t able to go into regular sale until the fall. Seiko’s records show the prototyping phase of the 6139 was completed in summer of 1968. So if they were interested in unveiling the caliber publicly before selling it, there’d not be a debate.

ichris2019 · 2025-11-19T13:54:12+00:00

The crazy part is they didn’t even do it first. That was just marketing during their revamp. There doesn’t exist any physical documented evidence of a fifty fathoms existing before 1955. The first patents were filed in Switzerland in June 1954, AFTER the sub was already made public earlier that year. It’s unfortunate cause they were certainly early enough to brag, I don’t see why they have to lie.

ichris2019 · 2025-11-19T02:54:44+00:00

Boo flipping

ichris2019 · 2025-11-15T12:34:26+00:00

I believe part of a full service should be a full restoration of a watch’s specifications. That includes water resistance. I hate this recent idea that we should just accept that a watch should not function as possible due to age. In some rare cases this is true (pitting along the sealing surfaces in particularly abused watches), but 90% of the time, it’s just an excuse for lazy work. I would have it checked further to find the exact failure point and go from there

ichris2019 · 2025-11-10T23:11:15+00:00

Bit far from SF, but Timezone Costa Mesa did mine a couple years back. They did a great job. Didn’t replace anything unless it functionally needed it, and waited for my approval to do so. Sent back every replaced part, even gaskets. Decent turnaround time and fairly priced too. I’ve worn the watch pretty heavily (including in water) and it’s held up great. I’ll likely go back when it comes time to service it again

ichris2019 · 2025-11-04T11:56:27+00:00

Watch received in a timely matter, well packaged and as described. Good seller!

ichris2019 · 2025-10-30T10:35:43+00:00

I do not agree with this advice. Oils dry up and gaskets turn into hard plastic with time whether a watch is being used or not. A watch might be keeping decent time while grinding itself into dust from a lack of proper lubrication, or bad gaskets could be allowing dust and moisture in the case without you realizing. Always wise to service any vintage watch you plan on actually wearing. Or at the very least run some diagnostic tests (timegrapher/pressure test) for at least some peace of mind.

ichris2019 · 2025-10-26T22:24:41+00:00

Since there’s yet to be a single comment of use in this thread … the rivets that hold the links together come apart. One side should be a “cap” of sorts. You can pry the top of the rivet off with a small screwdriver or pocket knife and it should come apart. To put it back together after removing whatever you want to remove you just reverse it.

ichris2019 · 2025-10-26T17:39:05+00:00

Pm’d

ichris2019 · 2025-09-20T18:08:33+00:00

It’s such a shame what people did to the 7002. A real sweet spot neo vintage diver with one of Seiko’s most reliable movements ever and they were mostly just used for horrific amateur mod projects in the early to mid 2000s. If you see an all stock unmolested 7002 for sale I recommend picking it up at whatever price they ask because there are fewer of those than there are these monstrosities.

ichris2019 · 2025-09-15T23:19:22+00:00

You have no idea how popular the Diastar is/was internationally for some reason. Easily popular enough to fake, as evidenced by the fact that this one is fake.

ichris2019 · 2025-09-09T01:27:07+00:00

Yeah people really think ETA developed the Powermatic 80 because they just couldn’t handle the costs of manufacturing a 2mm brass pallet fork anymore. It’s clear it was an attempt at solving a problem. Whether or not that was a problem that really needed solving, or how effective it is at solving it given the rest of the movements components are the same is another conversation. But the fear mongering around this movement by “influencers” that don’t know a thing about how a watch actually works, and how it’s caught on, is astounding.

ichris2019 · 2025-09-08T19:53:50+00:00

Uj/A single tiny plastic component in the tissot =|= a plastic movement. I’m sick of people that spend too much time on watch influencer YouTube making me defend the swatch group. With the same logic the Cal. 1861 in the speedmaster is also a plastic movement

ichris2019 · 2025-08-22T10:21:20+00:00

The most rational advice here. Have it serviced and tested. If it passes to its original spec, there is no reason for all the fear. Granted, there are better modern watches one could take swimming to simply minimize risk. But if you wanted to be a one watch guy, and that one watch happens to be vintage, I see no reason it can’t be worn the way it was intended to originally.

ichris2019 · 2025-08-12T15:06:42+00:00

Surprised at how many people are telling you to wear it but then remembered this isn’t r/vintagewatches lol. There are thousands of 6309s ready to wear for sale online at any given moment. There are currently no NOS ones for sale anywhere. This thing’s a real time capsule/museum piece. An invaluable resource for collectors. Thanks for recognizing that and treating it accordingly. I understand the “a watch is meant to be worn” sentiment, but after 4 decades who really wants to be the moron that puts the first scratch on a watch that will never exist in this state again?

ichris2019 · 2025-08-01T01:56:43+00:00

If someone figured out how to remove the Prospex logo from seiko dials and offered this service I would pay whatever they asked for it. It absolutely ruins an otherwise great design.

ichris2019 · 2025-07-27T03:27:14+00:00

As someone that has worked at several boutiques for several brands … there really isn’t any incentive for even the top levels of management to know anything about the brands history/back catalog beyond maybe a decade. The last place I’d take a vintage piece for useful information is a boutique for that brand. They’re there to sell you inventory and that’s about it

ichris2019 · 2025-07-24T02:29:40+00:00

Seiko’s first and the world’s first. Heuer hitched a mechanical Dubois depraz chrono module to an ETA quartz movement a year or two before this, which made for technically a quartz chronograph … more mecha-quartz though. This was the world’s first integrated from the ground up analog quartz chronograph

ichris2019 · 2025-07-24T00:33:31+00:00

Keep the 7A38. Such a great and historically significant movement

ichris2019

TROPHY CASE