View single post by Johnny P
 Posted: Tue Nov 21st, 2006 10:43 am
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Johnny P



Joined: Thu Nov 3rd, 2005
Location: USA
Posts: 1783
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 Temperatures

The next three test periods determine how much the rate varies between three different temperatures — 8°, 23° and 38°C. Excessive changes in the rate could show that the balance-spring alloy is not up to standard.:D


http://www.timezone.com/library/wbore/wbore631733384647656250

http://www.cosc.ch/chronometre.php?lang=en