From Montblanc's press release for the Only Watch2013 Rieussec:
"The timepiece is presented in a special packaging and equipped with a 500 hours quality certificate"
Now if the winner of that timepiece would graciously post an image of his certificate...
Seriously, I will see if someone can share this with us and confirm whether or not this special paperwork is being included with ALL Montblanc manufactured timepieces. I suspect it is being issued only for MBR and LL100 movements.
Best, Mike