Centaure was a Belgian maker. They made some very nice guns along with some lower price point guns.
http://www.littlegun.be/arme%20belge/art...0liege%20gb.htm

If you take the barrels off, you will find the proof house marks, which should include a date code. You can look up the marks and date code here:
http://damascus-barrels.com/bp.html

Pete