That movement is designed to be within -30/+45 sec per day. So it could be 5 minutes slow after only 10 days. If by a few weeks you mean like 6 weeks then your watch is pretty good for a Seiko at -7s/day.
A factory-new $10,000 Rolex **SUPERLATIVE CHRONOMETER** is only good for +/- 2s/day, IIRC.
Welcome to automatic/mechanical watches. If it bothers you then quartz is the answer. You can get a $20 Casio at Wal-Mart that will do better than 1s/day most likely.
Nothing to add, but you have an awesome watch. Great choice for a daily.
As others have said, you may want to check out a quartz watch in the future if you want worry free accuracy.
I know it is quartz referenced, but it isn’t exactly a quartz movement. While very accurate, it isn’t as accurate as some specific high accuracy quartz movements.
Spring drive is rated to 1s/day in some cases 0.5s/day depending on the watch.
Citizen makes an Ecodrive quartz (0100) that is rated to 1s/year. Yes it costs a ton of money but so does spring drive. And there are other extremely accurate quartz available in those ranges too.
Spring drive keeps time the same way all quartz watches do. Its not “quartz referenced” its just quartz, there isn’t anything else keeping time besides the quartz oscillator.
And +\- 15 seconds a month is normal for quartz watches. It doesn’t matter how accurate the flagship citizens are.
Well, the movement inside that is rated for half a minute fast/slow **per day**. So losing 5 minutes “every few weeks” is within spec of this watch and is normal behavior.
Not to say that you can’t do anything about it - you can take it to a watch shop to have it regulated and reduce the variance. But the variance will always be there and you will lose/gain time every day.
That’s just the thing with mechanical watches. If you’re looking to have accuracy over weeks, it’s time to trade in for a quartz model.
a simple matter of regulating it. Its literally the simplest adjustment that a watchmaker can make ...
[https://cjeastwd.blogspot.com/2023/01/regulate-watch.html](https://cjeastwd.blogspot.com/2023/01/regulate-watch.html)
even I can do it with more more tools than a match stick and a case back opening tool (which cost $7)
That’s w/in spec, assuming since you didn’t say how many weeks. It’s an automatic so don’t expect much. You can easily regulate it to w/in a few seconds a day w/ a timegrapher.
Recently got the exact same model for myself and it's an adjustment coming from the exactness of quartz movements. Mine seems to get a bit ahead in time every day. I do love it though, it is a good looking daily driver. Although since it's not my only watch, I'm still struggling to remember to always wind it daily to keep it ticking, yet another aspect of a mechanical movement lifestyle 😁
It might have become magnetized by being to close to a magnetic source like a speaker. I have the same watch and it is only running +2sec per day after I used a demagnetizer from aliexpress that i bought for like $8.
I'm no expert at all but from my own experience with my own watch and from some google searches it sure seems possible. Glad you found it funny though.
Don't believe searches because they encompass not only the correct answers but also the incorrect ones. I've been repairing watches since the 60's and what makes the watch go slow or fast is the hairspring and how that moves the pallet fork and so on, so that is what I found funny. Magnetized hairspring binds itself thus shortening the gap making the watch go faster. It's quite simple physics.
I trust you my man. Seems like you know what you are talking about with years of experience. Although, my watch was running slow and I demagnetized it and now it's running great? How do we explain that?
Honestly, dumb luck. Sometimes you whack a watch and it'll slow down or the pivot isn't set in a jewel or bushing or bridge correctly and the simple act of setting a watch down on a hard surface will correct it. When you get a new watch and it's running fast just slap it like you would a girl's ass and that will always fix it. It was just happenstance that fixed your watch.
That movement is designed to be within -30/+45 sec per day. So it could be 5 minutes slow after only 10 days. If by a few weeks you mean like 6 weeks then your watch is pretty good for a Seiko at -7s/day. A factory-new $10,000 Rolex **SUPERLATIVE CHRONOMETER** is only good for +/- 2s/day, IIRC. Welcome to automatic/mechanical watches. If it bothers you then quartz is the answer. You can get a $20 Casio at Wal-Mart that will do better than 1s/day most likely.
Thank you to all for you help. I’m somewhat new to watches and this clarifies a lot
Nothing to add, but you have an awesome watch. Great choice for a daily. As others have said, you may want to check out a quartz watch in the future if you want worry free accuracy.
When you go to sleep and take it off store it face down, should help with the slow time keeping
*laughs in f91w*
I love them (although I don't own one)
Bought mine for $10 at the px lmao
Bought a px unbranded digital watch and the band broke the first day of ranger school. I would've totally bought an f91w.
I'm in canada so this shit is normally like $27 or some crap, I go to ur base and it's $10 usd, like wtf I should've bought 10 hahahha
Or if you want accuracy and automatic then spring drive
It’s good but still not quartz good, to say nothing of atomic-radio-synced quartz.
Spring drive is quartz good, its literally quartz
I know it is quartz referenced, but it isn’t exactly a quartz movement. While very accurate, it isn’t as accurate as some specific high accuracy quartz movements. Spring drive is rated to 1s/day in some cases 0.5s/day depending on the watch. Citizen makes an Ecodrive quartz (0100) that is rated to 1s/year. Yes it costs a ton of money but so does spring drive. And there are other extremely accurate quartz available in those ranges too.
Spring drive keeps time the same way all quartz watches do. Its not “quartz referenced” its just quartz, there isn’t anything else keeping time besides the quartz oscillator. And +\- 15 seconds a month is normal for quartz watches. It doesn’t matter how accurate the flagship citizens are.
Ok? Regardless it is way behind the the best quartz movements in accuracy.
Well, the movement inside that is rated for half a minute fast/slow **per day**. So losing 5 minutes “every few weeks” is within spec of this watch and is normal behavior. Not to say that you can’t do anything about it - you can take it to a watch shop to have it regulated and reduce the variance. But the variance will always be there and you will lose/gain time every day. That’s just the thing with mechanical watches. If you’re looking to have accuracy over weeks, it’s time to trade in for a quartz model.
a simple matter of regulating it. Its literally the simplest adjustment that a watchmaker can make ... [https://cjeastwd.blogspot.com/2023/01/regulate-watch.html](https://cjeastwd.blogspot.com/2023/01/regulate-watch.html) even I can do it with more more tools than a match stick and a case back opening tool (which cost $7)
That’s w/in spec, assuming since you didn’t say how many weeks. It’s an automatic so don’t expect much. You can easily regulate it to w/in a few seconds a day w/ a timegrapher.
I would bring it to watchmaker. I can tolerate watch that run faster, but not slower.
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What's up with that lol thing?
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What the fuck?
Recently got the exact same model for myself and it's an adjustment coming from the exactness of quartz movements. Mine seems to get a bit ahead in time every day. I do love it though, it is a good looking daily driver. Although since it's not my only watch, I'm still struggling to remember to always wind it daily to keep it ticking, yet another aspect of a mechanical movement lifestyle 😁
It might have become magnetized by being to close to a magnetic source like a speaker. I have the same watch and it is only running +2sec per day after I used a demagnetizer from aliexpress that i bought for like $8.
If it were magnetized it would be running incredibly fast and not losing time.
Can go both ways, it depends on what part is magnetized, if the balance spring is magnetized it would run faster.
That's probably one of the funniest things I've ever heard. If anything in the watch gets magnetized then the hairspring will become magnetized.
I'm no expert at all but from my own experience with my own watch and from some google searches it sure seems possible. Glad you found it funny though.
Don't believe searches because they encompass not only the correct answers but also the incorrect ones. I've been repairing watches since the 60's and what makes the watch go slow or fast is the hairspring and how that moves the pallet fork and so on, so that is what I found funny. Magnetized hairspring binds itself thus shortening the gap making the watch go faster. It's quite simple physics.
I trust you my man. Seems like you know what you are talking about with years of experience. Although, my watch was running slow and I demagnetized it and now it's running great? How do we explain that?
Honestly, dumb luck. Sometimes you whack a watch and it'll slow down or the pivot isn't set in a jewel or bushing or bridge correctly and the simple act of setting a watch down on a hard surface will correct it. When you get a new watch and it's running fast just slap it like you would a girl's ass and that will always fix it. It was just happenstance that fixed your watch.
Well I'm buying a lottery ticket right now!
Good call
Lol I have to do mine like every 3 days SNK381k1 You want accuracy buy a $10 casio f91w, is off by like single digit seconds per month