Copy of Plaisir et Tristesse d'Amour

Copyright Infringement. Watercolor on paper, 1975, signed and dates Constant '75 bottom left. We have no reasons to believe this work was made by Constant (1920-2005). The work seems to be a copy of Constant's oil painting Plaisir et tristesse de l'amour, 1976. The work was offered to us for authentication by a Dutch auctionhouse. We have no idea of the current whereabouts of this work.