Belgium medal and case identification

I 'm requesting information regarding this medal and the case.

#1 What would this medal be awarded for?

#2 is there significance to the ribbon and the crown? 

#3 Is this the type of case this medal typically would have been issued in?

#4 medal weighs  20g   is this plated  or does it possibly contain some gold?

# 5 What would be a fair value for this medal?

U.F.A.C. – V.O.V. – Tervuren could be:
 

Union des Fédérations d’Anciens Combattants - Vlaamse Oud-strijders Vereniging
Union of Veterans’ Federations - Flemish Veterans’ Association - Tervuren chapter.

probably a private issue and nothing official

My tervuren dog announced my marriage … some decades ago :)

May be in the FORUM INSIGNES ET MEDAILLES ?