Archived posting to the Leica Users Group, 2000/09/13

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Subject: RE: [Leica] Re: Forbes article on mechanical wristwatches
From: Austin Franklin <austin@darkroom.com>
Date: Wed, 13 Sep 2000 20:09:44 -0400
 
> In order to be certified by the railroads for service, a watch
> had to be accurate in 5 different positions, to within +- 30 seconds a 
week.

And, I believe, be at least 17 jewels.  The dial also has special 
requirements, ie minute ticks, each 10 minute numbered, second hand... 
 Also it had to be lever set...