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Re: COSC -4/+6 spec

In Response To: COSC -4/+6 spec ()

: I'm confused what this COSC spec means. So if
: it's +4 per day, over 7 days my watch could
: be 42 seconds fast and it's still within
: specs?

Actually, your watch can have the wrong time by ANY amount and still be within spec.

The specification is is what is the maximum allowable variation per day *on average*. The great thing about mechanical watches is that the errors tend to largely cancel each other out.

A quartz watch that gains 2 seconds a day is pretty much guaranteed of being 20 seconds off 10 days later.

But a mechanical watch does not have that level of consistency, so a mechanical watch that gained 4 seconds yesterday might lose 2 seconds tomorrow and gain 3 the next--so over three days might average 1.7 seconds gain per day. At that rate, after 10 days, it may be only 17 seconds off.

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COSC -4/+6 spec

Re: COSC -4/+6 spec

Nicely said. Very clear! *NM*

Re: COSC -4/+6 spec

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0 wallclock secs ( 0.10 usr + 0.02 sys = 0.12 CPU)