Swatch Diaphane Automatic question

Joined
Jul 9, 2003
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1,702
I've bought two of these for christmas gifts; one for my dad and one for me. On the back it says "21 jewels"... I'm guessing the movements are on jewels? Anyone want to give me some info on the use of these jewels, what they are, etc?
 
ahh..so why are they used? the watch was only $140. it would seem that a watch containing 21 precious stones would be more...
 
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