Ferrer block

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Ferrer block
1856 Diligencia multiple, 'Ferrer block'.
Country of production	Uruguay
Location of production	Montevideo
Date of production	1 October 1856
Nature of rarity	Largest known multiple
No. in existence	Unique
Face value	15x 80 centésimos
Estimated value	between US$ 500,000 and US$ 600,000

The Ferrer block is a corner block of 15 of the 80 centésimos green 1856 'Diligencia' (Suns) postage stamps, and is regarded by many philatelists as the most important item of Uruguayan philately. Fred Melville, speaking philatelically, called it "one of the seven wonders of the world".^[1] It is the largest known multiple of this issue of which only a few blocks are known to exist. Most of the plating information about this issue has been derived from this one block.