Beautiful Merckx with a bit of history; Karel Mintjens is one of Frans 'Swa' Mintjens' (a Merckx teammate) brothers. They started a now famous furniture factory bearing his name. The decals on your bike actually use that firm's logo's :

http://www.mintjens.be/

There is a Mintjens bikesfirm too (with 2 shops) but they use different logo's and don't appear to sell Merckx-bikes (anymore?). Don't know if it's the same family either...