Cubist oilpainting 1950 by Dutch artist Otto Stam

Beautiful cubist work by the Kampen violin maker/painter Otto Stam (1913-1983). Won a gold medal with one of his violins in 1956 in Pegli, Italy. Painting was his great love. Academy Antwerp. Oil on canvas, 63x75 cm./ 24.8X29.52 inch. Signed and dated 1950, both on front and back. On the back: - Tree in " 't Jodendom " Bilthoven - Excellent condition.