Proof 1963 #25 and #50, the collection of die proofs (10) on gummed paper (70x57mm.); comprising #25 frame only in black, nearly complete design (lacks shading on walls etc.) in yellow-green and as issued in yellow-green and blue-green (2, one with printers notations), #50 nearly complete design (lacks shading on trees etc.) in olive-green, and as issued in olive-green, pale bright blue and deep blue (2, one with printers notations). A unique group.