Lot
543 
Mexico, 1884, Hidalgo Medallion, 12c green, imperf between, block of 4, o.g., rich color, Fine, this error is known mainly from a few unused pairs, this block may be unique. Scott No. 157a $500 for pairs.
Realized: $250
Sale 85: The Westpex Sale
1884 Hidalgo Medallion Issue
Lot 543
Mexico, 1884, Hidalgo Medallion, 12c green, imperf between, block of 4, o.g., rich color, Fine, this error is known mainly from a few unused pairs, this block may be unique.Scott No. 157a $500 for pairs.