First of all I know that this a marmite subject for many and a first world issue for most but, for me, accuracy is a ‘thing’.
I recently bought two CW watches, a Black 39mm Sealander automatic and a White 39mm Sealander GMT. Both brand new.
I love them both and have a hard time deciding which one to wear each day.
I use an App called “Watchtracker’ and over 8 days of mixed wearing and storage on a watch winder it has achieved an average of +2.7 seconds per day. Something I am really happy about.
Relatively speaking, the GMT has not done so well. With a similar mix of wearing and watch winder it is averaging -12 seconds per day. Still within spec but, if I’m honest, a little bit disappointing. Especially as this is supposed to have the better movement.
I will continue with them for a few months to see if the GMT settles down a bit. I might then consider getting it regulated.
Does anyone know if CW would do this (presumably paid) or, if I got it done at a local watchmaker, if this would affect the warranty?
For those of you that don’t care about accuracy, please don’t flame me, it’s just a little foible of mine. In time I’m sure I can get therapy.
Sealander Accuracy
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Sealander Accuracy
Last edited by Amor Vincit Omnia on Sun Jan 26, 2025 4:38 pm, edited 1 time in total.
Reason: Placed attached image(s) inline: https://www.christopherwardforum.com/how-to/how-to-t26825.html#p363604
Reason: Placed attached image(s) inline: https://www.christopherwardforum.com/how-to/how-to-t26825.html#p363604
- Amor Vincit Omnia
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Re: Sealander Accuracy
1. I doubt whether they would regulate it unless as part of a service, since it is keeping time to within their stated specifications, albeit not to your satisfaction.
2. It’s probably a good idea to let it settle down for a while; they sometimes do show an improvement after some time.
3. Regulation by a third-party would definitely invalidate your warranty; read the small print!
4. Don’t sweat it. It’s no big deal.
5. Finally, if you’re interested in the topic of timekeeping in general, this might interest you.
Precision, Rate and Accuracy in watches: a layman’s view
2. It’s probably a good idea to let it settle down for a while; they sometimes do show an improvement after some time.
3. Regulation by a third-party would definitely invalidate your warranty; read the small print!
4. Don’t sweat it. It’s no big deal.
5. Finally, if you’re interested in the topic of timekeeping in general, this might interest you.
Precision, Rate and Accuracy in watches: a layman’s view
- These users thanked the author Amor Vincit Omnia for the post:
- Ralphhardwick
Steve
Linguist; retired teacher; pilgrim; apprentice travel writer
Take nothing but pictures, leave nothing but footprints, kill nothing but time
Avoid loud and aggressive persons; they are vexatious to the spirit. (Max Ehrmann)
Linguist; retired teacher; pilgrim; apprentice travel writer
Take nothing but pictures, leave nothing but footprints, kill nothing but time
Avoid loud and aggressive persons; they are vexatious to the spirit. (Max Ehrmann)
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Re: Sealander Accuracy
There are many variables that affect the timekeeping of a mechanical watch and even COSC certified watches will drift over time.
The best thing to do, is to wear and use your watches normally for a couple of weeks and note the timekeeping.
Ask a local watchmaker to regulate to your personal use, ie, don't go through a full positional check, but simply increase or decrease the rate by the required amount to bring the watches into tighter tolerances.
The vagaries of positional variation, make regulation personal to the owner.
The best thing to do, is to wear and use your watches normally for a couple of weeks and note the timekeeping.
Ask a local watchmaker to regulate to your personal use, ie, don't go through a full positional check, but simply increase or decrease the rate by the required amount to bring the watches into tighter tolerances.
The vagaries of positional variation, make regulation personal to the owner.
- These users thanked the author MarkingTime for the post:
- Ralphhardwick
- rkovars
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Re: Sealander Accuracy
While rare to have one slow down I would still check for magnetism too. I have had a couple over the years slow down being magnetized. Easy to check and mark it off the list.
- These users thanked the author rkovars for the post (total 2):
- Ralphhardwick • rsg
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Jack London
Jack London
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Re: Sealander Accuracy
Regulation is not terribly expensive. Therapy costs more and may have mixed results.Ralphhardwick wrote: ↑Sun Jan 26, 2025 4:34 pm
For those of you that don’t care about accuracy, please don’t flame me, it’s just a little foible of mine. In time I’m sure I can get therapy.

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- Ralphhardwick • rkovars
with Kung Fu grip, and life-like hair
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Re: Sealander Accuracy
Thanks for the comments.
I’ll keep tracking them and let you know how they perform.
I’ll keep tracking them and let you know how they perform.
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