From the collection of Dr. Conrad Latto)" /> Proof 1871-74 1d. magenta, an imperforate plate proof block of twenty (5x4) on unwatermarked thick surfaced paper, with complete margins (upper right corner defective) and each handstamped "CANCELLED" in black; minor imperfections to margin only. The only recorded complete sheet. (<I>From the collection of Dr. Conrad Latto</I>) | Christie's