How accurate should mechanical watch be?
Discussion
For a non-COSC certified movement that's fitted, you're doing well at that rate straight out of the box.
If it's still the same in a fortnight's time or so, then you've even more cause for celebrating.
You could probably get it regulated to be even tighter, but it's hardly worth the bother.
The one thing you should do, is check the time against time.is (atomic time) on your phone's browser before taking it off each night, and leave it in a different position. Check it again in the morning, and it'll give you an idea of its positional accuracy.
You might find one position reduces the overall gain from the day, meaning you'll never be far off the correct time.
If it's still the same in a fortnight's time or so, then you've even more cause for celebrating.
You could probably get it regulated to be even tighter, but it's hardly worth the bother.
The one thing you should do, is check the time against time.is (atomic time) on your phone's browser before taking it off each night, and leave it in a different position. Check it again in the morning, and it'll give you an idea of its positional accuracy.
You might find one position reduces the overall gain from the day, meaning you'll never be far off the correct time.
You're in the COSC standards spec for the average daily drift, so it'll be better than quite a lot of big names.
https://en.wikipedia.org/wiki/COSC
https://en.wikipedia.org/wiki/COSC
My six-month old Submariner loses circa 30 seconds a week. My 20-year old Seiko Quartz is accurate to a couple of seconds a year. I only ever wear the Seiko when there's a high risk of damage - the Sub is on my wrist for 99%+ of the time
After wearing the Seiko as a daily for 20 years, I thought the lack of accuracy would bother me - it doesn't and in fact its rather nice to take the Sub off my wrist to reset it - get to feel the quality...
Few buy an automatic for the accuracy
After wearing the Seiko as a daily for 20 years, I thought the lack of accuracy would bother me - it doesn't and in fact its rather nice to take the Sub off my wrist to reset it - get to feel the quality...
Few buy an automatic for the accuracy
uncinqsix said:
My cheapy Seiko 5 is currently 20 seconds fast. I last reset it (to atomic time) a fortnight ago...
Thats probably because its inaccuracy and the correction caused by leaving it in a certain position overnight almost completely cancel each oother out.I had a TAG Heuer regulated by Duval in 1993 and when it came back it was so accurate that it was still witin five seconds between the clocks going forward and going back again! At the time I thought that it was the result of luck and great adjustment, but I now realise that it was a regular schedule and a coincedentally matched inaccuracy and correction as described above.
GC8 said:
uncinqsix said:
My cheapy Seiko 5 is currently 20 seconds fast. I last reset it (to atomic time) a fortnight ago...
Thats probably because its inaccuracy and the correction caused by leaving it in a certain position overnight almost completely cancel each oother out.
similar question here regarding a two year Seiko Monster with the movement that you can manually wind as well (i know the movement has a specific number but no idea what it is). it has always lost about 30 seconds and i am tempted to buy myself one of little spanners to open it up and see if i can get that down a little.
any views, is it worth a fiddle based on 30secs a day or is this about as good as i should expect. if i could get it to within 10 secs a day then i would be happy, am i being realistic.
any views, is it worth a fiddle based on 30secs a day or is this about as good as i should expect. if i could get it to within 10 secs a day then i would be happy, am i being realistic.
GC8 said:
You may be able to correct that by laying it in a different position when you take it off at night.
i have just been reading about this. i do not usually take it off but i might try for a couple of weeks in different positions and see if i can easily find one which reduces the loss.thanks
If you want accuracy then quartz is the defacto standard. If you want real accuracy then radio link is the way.
In the middle is the Bulova Precisionist range which has a claimed accuracy of 10 seconds per year.
As said previously 5 seconds per day for a non COSC is pretty damned good.
In the middle is the Bulova Precisionist range which has a claimed accuracy of 10 seconds per year.
As said previously 5 seconds per day for a non COSC is pretty damned good.
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