Mexico 20th Century Issues 1947, "Justo Sierra", 10p., a group of

Mexico 20th Century Issues 1947, "Justo Sierra", 10p., a group of five die proofs on thick card, collectively illustrating various stages of the printing process. Includes one proof of the background alone, one of Sierra's vignette, and three bicoloured proofs featuring both the background and vignette in black, green, and reddish green. All in pristine condition. Very few examples are known. Scott 828 var.

Estimate:$250

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