6R35 movement review

[Gary Busey]

Hi all,

just got spb 147. So far pleasantly surprised. 2 days and running around +5 seconds a day, average.
When worn and in movement, id say its about + - 0spd. The issue lies when you are in the office, not moving alot, or when you are sleeping. Then it can loose 10 seconds in a night.

Overall, not bad. but somewhat inconsistent, especially compared to my Black Bay.
For 1K$, i have no issues with this at all.

Power reserve is true, even 1 hour extra, which is impressive. Next step is to figure out which position to put it in a night.

[ProfessorPJ]

Thanks for the update


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[1William]

I agree with your observations. The more I wear my Seiko watches the more accurate most are.

[toxicavenger]

Sounds like it is running good to me. The correct way to time a watch is over 48-72 hours. Hour to hour means very little since the movement loses or gains time in different positions.

[KatGirl]

Don’t have any 6R35’s yet, but my 6R15’s are very accurate.

[SunTzu]

I agree with the power reserve. My SPB145 never stops

Seriously, it lasts and lasts when I'm not wearing it.

[ProfessorPJ]

So this may be a dumb newbie question, and feel free to respond with “search more”, but my understanding is that Seiko only advertises these at much worse specs (~30/45 I think?).

Is that simply because of mass production and the limited ability on their end to only quality control (i.e random test) to that level of precision or an unwillingness to deal with warranty issues (read: customer gripes) about pieces that fall outside of that range? (Or some function of both?)

It seems like everyone who’s had an issue with these movements can get them regulated to quite impressive rates.

(Sorry again for long and potentially incoherent post. I only get to play on TRF after baby is asleep)


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[Gary Busey]

update: =6 spd average.
crown down overnight, it manages to not loose time.

the more active i am the less it looses.....its pretty decent. Not close to the advertised specs...much much better.

[toxicavenger]

Originally Posted by ProfessorPJ

Is that simply because of mass production and the limited ability on their end to only quality control (i.e random test) to that level of precision or an unwillingness to deal with warranty issues (read: customer gripes) about pieces that fall outside of that range? (Or some function of both?)

Honestly, only Seiko could answer this question. If I was answering it, then the answer would be, because some watch customers are super anal about time and would complain all day long if their watch was one second over spec. So it would be better to open up that window for fluctuation. Most buyers do not understand that timing changes all during the day according the position the watch is in.

To accurately time a watch I do it over 3-5 days at a minimum.

[ProfessorPJ]

Originally Posted by toxicavenger

Honestly, only Seiko could answer this question. If I was answering it, then the answer would be, because some watch customers are super anal about time and would complain all day long if their watch was one second over spec. So it would be better to open up that window for fluctuation. Most buyers do not understand that timing changes all during the day according the position the watch is in.

To accurately time a watch I do it over 3-5 days at a minimum.

Thanks for the reply, that makes a lot of sense and that’s what I assumed given how anal I am about my wife’s Milgauss that runs +5 knowing it sits in a case most of the day but runs pretty close to spec when I wear it for a couple of days nonstop. I was just surprised by how big the advertised range is compared to everyone’s actual experiences. I’m just surprised they don’t advertise it (6r) as something like +- 20 given how well it performs in reality.


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[toxicavenger]

Originally Posted by ProfessorPJ

Thanks for the reply, that makes a lot of sense and that’s what I assumed given how anal I am about my wife’s Milgauss that runs +5 knowing it sits in a case most of the day but runs pretty close to spec when I wear it for a couple of days nonstop. I was just surprised by how big the advertised range is compared to everyone’s actual experiences. I’m just surprised they don’t advertise it (6r) as something like +- 20 given how well it performs in reality.


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I can tell you from my personal experience dealing with the 6r15 it has never ran great for me. It has always been all over the place. I have actually had better luck with the replacement NE15.

[Dsmith1974]

Originally Posted by ProfessorPJ

So this may be a dumb newbie question, and feel free to respond with “search more”, but my understanding is that Seiko only advertises these at much worse specs (~30/45 I think?).

Is that simply because of mass production and the limited ability on their end to only quality control (i.e random test) to that level of precision or an unwillingness to deal with warranty issues (read: customer gripes) about pieces that fall outside of that range? (Or some function of both?)

It seems like everyone who’s had an issue with these movements can get them regulated to quite impressive rates.

(Sorry again for long and potentially incoherent post. I only get to play on TRF after baby is asleep)


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Seiko always under promise and over deliver. If they it’s accurate to 2s a day it’ll more likely be 1. If they say it needs servicing every three years it’ll likely go for ten.


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[KatGirl]

Originally Posted by Dsmith1974

Seiko always under promise and over deliver. If they it’s accurate to 2s a day it’ll more likely be 1. If they say it needs servicing every three years it’ll likely go for ten.


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Exactly what HE said. Apparently, Seiko doesn’t want the hassle of folks complaining about inaccurate movements. When the watches come from the factory, they are always way more accurate than the promised specs.

[ProfessorPJ]

Originally Posted by KatGirl

Exactly what HE said. Apparently, Seiko doesn’t want the hassle of folks complaining about inaccurate movements. When the watches come from the factory, they are always way more accurate than the promised specs.

Thanks everyone for the info!


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[Gary Busey]

7 day all around average is +7 a day

[krounchou]

Tested on 5 days and I am at -3.4s / day in average. Laying flat at night compensates de loss of seconds during the day (around +4 to +5s at night and -8 to -10 during the day)

[keeso]

Originally Posted by KatGirl

Exactly what HE said. Apparently, Seiko doesn’t want the hassle of folks complaining about inaccurate movements. When the watches come from the factory, they are always way more accurate than the promised specs.

I think this style of doing business is really admirable. Fine way of beating the costumers expectation positively. Way to go Seiko.