By saying remainder I mean the remaining parts of the cancel. Sorry for any misunderstanding.
1.About the cancelled year "06"=1906?or Your guess at 08(1908)?
My eyes may be tired also. It could be '06', it may be that I am mistaking a part of the stamp for a part of the cancel. It is always better to have the actual stamp / cancel in hand do you can turn it and view it at different angles and lights.
3.Why post a no idea stamp then cancelled by the Belgium post stamp if it made from Austria,Is it a private postcard? so not shown on both countries catalogue ?!
Perhaps my fault for not phrasing my words so the meaning is clear.
That is a Belgium stamp (Belgique is Belgium in French) with a Belgium cancel. This means only that the postcard was mailed or posted from Belgium.
Where the card was manufactured is another story. It was made in Austria I am assuming because the postcard maker Max Munk was based in Vienna, Austria.
The postcard was made so it could be used in many countries. There are three languages on the back. Carte Postale is French, Postkarte is German, Cartolina Postal is Italian. So this card could have been used in many counties in Europe. People in Belgium would speak French or English or perhaps other languages like German. It is a multiple-country-use-card.
The artist could have been from anywhere in the world and just sold his work to Max Munk to be reproduced on postcards.