Thanks for the add.review

Question, bought a Seiko mm200, 6r30 movement. Worn it 21 days, night and day except shower. It has gained 60 seconds in 21 days. Not bad. Put it on a time grapher and dial up it says+7. Dial down it's +27. Can anyone explain that. Thanks in advance.

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I have no idea.  Just wanted to give a thumbs-up from Charleston. Welcome onboard.

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This is caused by the balance wheel not being perfectly balanced, causing it to run slightly faster in some positions. It's known as positional variance, some higher end movements like Rolex for example have free sprung balances with adjustable screws which can reduce the issue. Alternatively a watchmaker or manufacturer can use a posing tool to remove small amounts of material from the balance wheel to make it run more true. Gravity also has an effect in different positions leading to variances in timekeeping 

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Aurelian

I have no idea.  Just wanted to give a thumbs-up from Charleston. Welcome onboard.

Thanks brother, glad I found y'all.

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Warrior75

This is caused by the balance wheel not being perfectly balanced, causing it to run slightly faster in some positions. It's known as positional variance, some higher end movements like Rolex for example have free sprung balances with adjustable screws which can reduce the issue. Alternatively a watchmaker or manufacturer can use a posing tool to remove small amounts of material from the balance wheel to make it run more true. Gravity also has an effect in different positions leading to variances in timekeeping 

Thanks Warrior for taking the time out of your day to give me your thoughts on the subject. Keep on ticking brother