Historique Chronograph reference number - (2 Replies)

Been looking into getting one of these and saw that the reference number 47101 had 3 different ending numbers in the yellow gold. 47101/2 47101/3 and 47101/4 what is the difference between these...

Source: http://vacheron.watchprosite.com/?show=forumpost&fi=14&pi=4965793&ti=751133&s=0

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