Proof Block Larger Than four 3c Proprietary, Blue & Black trial color plate proof on bond (RB3TC), R. margin horizontal block of eight, large to immense margins all around, full o.g., never hinged, extremely fine , Scott retail $480.00
Proof Block Larger Than four 3c Proprietary, Blue & Black trial color plate proof on bond (RB3TC), R. margin horizontal block of eight, large to immense margins all around, full o.g., never hinged, extremely fine , Scott retail $480.00
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
