Change Author / Owner : 50 lire Noah's Ark, Rainbow and Doves single
On April 23, 1974, Vatican City issued two stamps to observe the centennial of the Universal Postal Union. The 50-lire stamp depicts a mosaic of Noah's ark with a rainbow and a dove with olive branch. The 90-lire stamp depicts a lamb drinking water from a mountain stream and has the Tablets of the Law on top.
The stamps were issued in panes of thirty and have a perforation of 13 1/4 x 14. IPS, Rome, printed 1,600,000 complete sets in five colors, offset, on glossy white paper.
"Centenary of the Universal Postal Union." Vatican Notes 23, no. 1 (July-August 1974): 1.