cazalea
[Seiko Moderator]
20890
I'm perplexed by multiple people claiming they run fast
Consistency is harder to achieve than "speed" so it being fast is a problem, the Grand Seiko service people should slow it down and problem solved.
Watches that run very fast often have a balance wheel spring with two coils touching, which shortens the effective length of the spring and speeds the movement.
GS claims "The best Grand Seiko Mechanical Movement Ever Created"
If it's not satisfactory, we should hold them to the claim.
Personally, I have had about two dozen Grand Seikos and have never had any problems (other than wanting to buy more and thus selling a few along the way).
Here is the spec for that movement:
Winding mechanism Automatic with manual winding
Mean daily rate*1 +5 to -3 seconds per day
Normal usage accuracy +8 to -1 seconds per day
Power reserve ~ 80 hours
Vibrations 36,000 vibrations per hour (10 beats per second)
Number of jewels 47 jewels
Features
-Dual Impulse Escapement
-Twin barrels
-Instant date change mechanism
*1 - Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.
Cheers,
Cazalea
What is your experience with the 9SA5 caliber? A brother of mine (the one who is "guilty" of my love for watches) is considering a GS with it.
He is not sure about buying it because there are multiple web publications that it runs considerably fast. Clearly out of specs. He asked me my opinion but my only GS is a spring drive so I have no answers. Thanks in advance.
Based on the experience with just one individual watch:
I am very happy with it. The movement ist impressive, innovative and beautiful - I would buy it again. After running 15 to 20 sec fast in the beginning of our relationship it is staying now at 8 to 9 sec/d. Which is no problem with me - simply pull the cr...
According to Japanese site
実際にキャリバー9SA5の精度は平均日差＋5秒～－3秒を誇ります。 Actually, Seiko boasts the accuracy of cal. 9SA5 is average +5 sec to -3 sec/day. I own a spring drive so it's very accurate, not yet the one w/ cal 9SA5.
It would help if you didn't use foreign language characters...
So the majority of our community can read your posts...😉
I have it in my SLGH013
No discernible deviation when I wear it one week at a time. ...
I'm perplexed by multiple people claiming they run fast
Consistency is harder to achieve than "speed" so it being fast is a problem, the Grand Seiko service people should slow it down and problem solved. Watches that run very fast often have a balance wheel spring with two coils touching, which shortens the ef...
Hi. When my brother told me about this I couldn’t believe it. As we all know GS is famous for being even more accurate than what they themselves claim.
If this is a frequent problem I hope and I’m sure that GS will solve it. Have a nice day.