The Umpth Copy of "Interieur met laddertjes"

Copyright Infringement. Gouache on paper, 1960, signed and titled bottom left. We have no reasons to believe this work was made by Constant (1920-2005). A private collector send us the image. Is similar to a work of doubtful origin that was sold to an employee of a Dutch museum in 1999. In 2012 the museum offered that work to Fondation Constant for it's archives.