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> The amount of torque provided by the mainspring is
> relatively constant until there is say less than 15%
> power left. At that point you will see a quick
> decline in the rate of the watch.
[and]
> the preferred method by the automatic action of
> the rotor spinning 2 - 3 minutes spinning the rotor
Ah ha! this would make a lot of sense.
I had mentioned in my first post that it keeps wonderful time (around 5-6s/24hrs) when well-wound, but if I've left it off the wrist for a solid day, it drops precipitously.
I do try to keep it well wound -- I'll touch it up for maybe 2-3 minutes in the morning, and 1-2 minutes at night before I sleep. Doing this keeps it pretty happy. It's just over the weekends, I tend to forget to touch it up.
Does swishing it for 3 minutes bring it to a full reserve charge? How can you tell (either by swishing, or by winding the crown) when it's reached full capacity, short of having a reserve meter?
Steve and Christopher, thanks for your help. I wasn't complaining -- mostly just curious about the power characteristics of the mainspring and automatic movements in general -- whether they tend to degrade gracefully (over 40 hours, a gradual slowdown) or if there's a plateau of torque and then a sudden drop at a certain point (and what that point would be... which is apparently the case.)
