Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World. Part 2
Lot 1205:
1889, red trial overprint ”Provisorio” on 5c violet, and inverted green trial surcharge 5c on 7c bister brown, unused, no gum, the last one with slight reversal toning, otherwise VF, Est. $120-$150, Scott #73, 101
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