Davis watch (paris) need to open the face

Question

I purchased this watch in holland, i t was made by Davis watch in Paris.One of the number has come loose and I want o open it to fix it. I am leaving on a trip tomorrow and don't have time to take it anywhere. http://www.davisgifts.com/detail.cfm?sCollName=mretro&nIdArticle=1265LIVRAISON PAR CHRONOPOST that is the model, its the one on the page.THANKS !!!!!!!!!!