20c Desert Plants, Saguaro Cactus Vertical Pair, Imperforate (1945c).
Mint N.H. transition block of 16, right pair of Saguaro design completely imperforate, four stamps to left with horizontal perforations partly complete, other stamps normal, bright colors, Very Fine and rare, Datz states only 2 pairs known,
Scott Retail as pair without premium for the transition multiple
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