6R35 accuracy

Accuracy has been my biggest issue about “new” Seiko.

Despite the hate it gets (hardlex, bezel alignment, etc.), which I think is overblown, I really feel that Seiko has stepped up and made better watches, except that they don’t do anything about accuracy.

We know Seiko movements can be accurate. Microbrands regulate NH movements all the time before their watches are shipped to customers.

I wish Seiko made an equivalent to a “top grade” variation of their movements with a tighter accuracy tolerance for ther $1000+ watches.

You're right and especially given the fact that brands like Hamilton, with watches in the same or even a lower price range, can make far more accurate watches. I've heard people with Hamiltons saying they get around 5spd, which is insane for the price.

This is a common annoyance with Seiko, it doesn't matter if you buy a 150, 500 or 1500US$ from them, it will have inside the same plodding unregulated movement.

The spb153 has a 6r movement not a 4r.... I've got 151,153 & 147, all 6r's. They all are pretty ropey on my timegrapher but much better on the wrist.

TBH I've found the 4r's (Turtle) more accurate than the 6r's, maybe the isochronism isn't as good due to the longer power reserve 🤔

Yes you're right! I'll correct it in my original post.

Sorry, wasn't trying to be a dick just wanted to help. Cheers mate 👍🏻

Don't send it off for service: It's giving you precisely the level of accuracy that Seiko intended for you to get out of it. It would be easy for Seiko to give you better accuracy, but why in the world would they do so? As they say, ""why buy the cow when you can get the milk for free?"

For example, it would be easy for me to work hard and put in lots of effort at work. But, I don't. I work precisely as hard and give as good of work quality as I'm paid to give. No more, no less. I would be a fool to work any harder than I'm paid to do, yeah?

Luck of the draw it seems with Seiko. Great wrist comfort on them though is often a consolation.

That’s basically what I currently do, but because of it I find myself going for the more accurate watches that I own. And I hate this because the willard on an uncle seiko president bracelet is just 😙👌

That’s all good but if a service improves the accuracy, the watch is basically perfect.

Well, in which case, you don’t need a full service, if all that’s bothering you is the accuracy. Why not bring it in to a local watchmaker and have it regulated? Would cost a lot less and take less time!

The higher the better obviously, but I have no idea what kind of accuracy it would be able to achieve with a good regulation.

Very fair point. I hadn’t thought about that!

When I got my SPB147, it gained seconds by the hour. Took the case back off & adjusted it as best I could. Figured it was magnetized since it was used. Bought a demagnetizer on Amazon & it did help. However, as one user said on WC before, the 6R35 is the most “consistently inconsistent” movement ever made. It will run however it wants 100% of the time. No matter how I set it down at night, how long I wear it, what the temp is, it simply does what it wants. I wrestled it into +/- 10 spd for right now but who knows if it will change again.

This is helpful! Thanks a lot!

These are all good points. I certainly appreciate the accuracy on my higher end watches but my seiko has a special place in my heart as well!

I have had an SPB143 for about 6 months and I just sent it to a service center under warranty because the watch was loosing about 45 to 50 seconds each day with too low an amplitude, which is out of specs. What bothers me is that this has been inconsistent. there have been times when the watch ran within +/- 10s/d which is ok. So I'm really perplexed and I can't know what to expect when the watch comes back from service. Other than than, fantastic watch!

I also got an SPB153 recently and the accuracy is far from impressive - it loses about 10 seconds a day when I wear it, but seems to gain a few seconds when resting face up, so this offsets the negative effect a bit. Not sure what the accuracy will be once the movement settles, but reading the comments about 6R35 I'm happy with the current accuracy, as it seems it could have been a lot worse.

A few months later I can say that the accuracy did get worse! Now it's losing -25 sec/day and a local watchmaker mentioned that the amplitude of the moving is like that of a 20 years old movement without servicing. I guess I'll ask Seiko for a warranty service soon, as that's quite disappointing.