Lot
580 
Mexico, 1966, 20c Olympics, color omitted errors, two multiples; right margin block of 6 with transitional black omitted on right stamps, and strip of 4 with left stamp with blue omitted, o.g., never hinged, few light tone spots affecting block, otherwise Very Fine. Scott No. 974 vars. Estimate $250 - 350.
Realized: $250
Lot
581
Mexico, 1969, 40c Puerto Vallarta, "1969" imprint unissued, "1969" instead of "1970" year at bottom, o.g., never hinged, Very Fine, only 100 produced. Scott No. 1010 var. $500.
Realized: $270