A closer look at a Seiko...

U ulackfocus

So what do those online calculators say about 25,000+ posts? How much "money" should I be getting "paid"?

makaria indica

Al your posts and knowledge are very informative. If you post your PayPal address I would happily make a small contribution, to help reimburse your time spent " Not really working"

makaria indica

Al your posts and knowledge are very informative. If you post your PayPal address I would happily make a small contribution, to help reimburse your time spent " Not really working"

Mtek

@Archer I would donate to you as well, I’m sure others would too.

Your time spent, knowledge shared, is very generous. I can only assume the test equipment you use is costly too.

Archer

Thank you for the offer - very generous but I will have to decline. On occasions where people offer to pay me for my time like this, I suggest that instead you make a donation to either the Arthritis society or the Heart association in your country. Of course any other charity would be fine too - those two just mean the most to me personally.

Cheers, Al

dennisthemenace

Noobs, don't you just love em?

Archer

Thank you for the offer - very generous but I will have to decline. On occasions where people offer to pay me for my time like this, I suggest that instead you make a donation to either the Arthritis society or the Heart association in your country. Of course any other charity would be fine too - those two just mean the most to me personally.

Cheers, Al

makaria indica

Arthritis it is then.

makaria indica

Arthritis it is then.

Lonestar

I picked Heart to keep things balanced.

Thanks again Al - please keep them coming, you are one of the people who make this community really great 😀

Paul

airansun

And you’ve got me on the edge of my seat: can’t wait for you to open the Seiko up and ‘tear it apart’ physically and verbally.

Mouse_at_Large

Excellent analysis. The only thing that I'd suggest is that the flatness of the hands and the dial markers on the Seiko -v- the AT may be dictated by the desire to have large flat areas to apply lume to in what is notionally a "divers" watch. Not saying that cost isn't a factor as well 😉

Larry S

Let’s remember this is a lower level watch and that this same company’s Grand Seiko and Credor lines are simply stunning.

Archer

So a while back there was a thread in the "other brands" forum that was asking how Seiko was able to make such nice watches for such low costs. The ensuing discussion brought out many different points of view, and I added mine from a technical/watchmaker point of view, and it was a lively discussion at times. At one point in the thread, member @Laharrier showed a very nice Seiko and said the following:

“If you really want to be shocked by Seiko value, get your hands on an SPB/SBDC053 or 051. My goodness does this watch kick ass. In house movement, regulated at the factory and keeping time within cosc spec. Finish equal to that on my Tudors and Omegas in every way, and a much more thoughtfully designed case both in form and function. Unbelievable watch for $600 shipped from japan.”

This resulted in a little push back from various people, and in the end @Laharrier said that really we needed to have one in hand, and we would see how good they are. I asked if he was willing to send it to me to do an evaluation, and before that was ironed out member @Faz (who started the thread) had ordered one, and we made arrangements for it to be sent to me to have a closer look at it once it arrived.

That watch is now in my shop and I thought I would post this in the open forum so we can get more input.

So my first impression right out of the box is that this is a very good looking watch, and I wondered if Faz would let me keep it! 😀 I don’t have a blue dialed watch, and this one is a very nice blue – not too in your face but not too subtle either.

So let’s look at the exterior first. I don’t know what grade of steel Seiko uses, but the finishing on the case is quite nice. The top surface of the case is a simple circular grain, with polished facets on the lugs, and a straight grain finish on the case sides. Looking at the polished areas with a loupe, I can see what in car terms would be called a bit of an “orange peel” effect, so it’s not as smooth and perfect as I’m used to seeing on higher cost watches. From the way I look at things all the finishes on this watch should be easy to reproduce, or in some cases even improve, by any watchmaker who is proficient at case refinishing.

Some photos:









The crown is large and easy to grip, but has no logo on it, which I found odd. I did note that when screwing the crown back down, on a coupe of occasions it didn’t catch right and I had to back the crown up to get the threads started – something I don’t normally find I have to do actually.

The bezel is easy to turn – maybe too easy, and despite the fact that the ratcheting of the bezel feels very imprecise and somewhat wobbly, when you back the bezel up to a hard stop the bezel lines up perfectly with the dial, so marks for that. But the feel of the ratcheting doesn’t inspire confidence. The bezel insert is very nicely done, and in that previous thread someone mentioned that it might be metal that has been lacquered over. I’m not sure of the exact process but in any case it’s very nice, but how durable it will be over time remains to be seen.
The sapphire crystal is nice, has a slight dome, and appears to be AR coated.

The dial and hands are well executed, however some small details are missing. The hands are simple and flat, with no angled surfaces on them as some other brands may have. The markers on the dial are well done, but again are rather flat and plain.



So I don't have really any modern watches in the shop right now, other than a 25318000 SMP and a Speedy Pro, so those aren't really the same sort of dressy sport watch that this one is. I found it difficult to find an Omega analogue since this is a very dressy diver from Seiko, and has a rotating bezel. So I went back through photos of watches I've serviced, the closest blue dialed watch that sort of matches this Seiko that I have photos of is a blue dialed Aqua Terra - this one is a ref. 25028000, with the 2500 movement:



The case is a rather standard Omega twisted lug design, and like the Seiko combines polished and brushed surfaces. Due to some of the curved surfaces this is a little less straightforward to finish/refinish than the Seiko is. And of course it doesn't have a rotating bezel, but I can say that Omegas that do have rotating bezels tend to have a more precise feeling bezel action that this Seiko does.

The dial and hands on this one though show a marked difference in quality:



Similar type of finish on the dial surface, but the polished markers are nicely chamfered, and the hands have that break down the middle, so unlike the Seiko this watch is not as "flat" in appearance. Not a direct comparison, but the closest I had photos of.

So a few other things were looked at initially, and next I checked the accuracy of the date change. This watch uses a semi-instantaneous date change system similar to many Omegas, and Omega’s tolerance on this is a very generous +/- 10 minute of midnight. Personally I would not accept something that far off, since it’s so easy to get it much closer. But in any case this one clicked over a 8 minutes to, so it meets Omega’s specs:



This watch is rated for 200m, so I popped it in the dry testing machine and used the dive watch program – this tests the watch with a vacuum first, and then a pressure, while measuring the deflection of the case. It measures the amount and pattern of the deflection to check water resistance:



The watch failed the vacuum test, and passed the pressure test:



So what does this mean? Well sometimes watches that are rated for very deep depths are so rigid that the machine thinks it’s not moving, and therefore leaking (air exchanging in and out of the case freely). This is more likely to happen when pulling the smaller vacuum, than when subjecting the watch to a much higher pressure. So this result is not terribly unusual, but just to confirm it’s okay I use the leak finder program:



This test is essentially a very long version of the pressure test – if the watch is leaking, then the air pressure inside and outside the watch will equalize over time:



The machine monitors the deflection very closely, and at the end it will tell you if the leak is too big to test the watch in water – in this case it says the leak is either not there or small enough that there is no risk in water testing:



So if the watch is leaking, once it’s out of the test chamber, the pressure inside will be higher than outside. If I put it in a glass of water (standing by ready for this test) then there should be a stream of bubbles coming from the location of the leak as that air escapes to atmosphere:



Seeing none, I’m going to say it’s sealed fine:



Since this ended up being a very long series of tests, I'm going to stop here, and will post more in the coming days about the remainder of the testing and my observations.

As always, questions are welcome.

Cheers, Al