Re: [Leica] Forbes article on mechanical wristwatches

["Simon Lamb" <simon@sclamb.com>]

"Dante Stella wrote:
>
>
> Lots of cool moving parts, but you end up setting both every week.  The
> standard variance for mechanicals, or so I read, as +/- fifteen seconds
> per day.  That's a hell of a lot when you compare it to +/- 30 sec/month
> with a one-dollar Japanese quartz movement.  But nothing beats a good 5hz
> mechanical tick.
>
 The standard variance for mechanical watches varies from manufacturer to
manufacturer.  I have Omega, Rolex, Breguet etc. and the manufacturing
tolerances regarding accuracy differ widely.  As an example, a Breguet is
factory set to gain +2 seconds a day, as are Rolexes.  I took my Rolex back
to the London centre when it started gaining five seconds a day and they
serviced it and re-calibrated the movement.  Now it is accurate to less than
two seconds a day, and has been for the six months since it was
re-claibrated.  As with anything mechanical, an overhaul is recommended
about every five years.

Simon