3c Washington, Trial Color Proofs (158TC1, 158TC3).
First hybrid in Black die sunk on 74 x 88mm card showing full die sinkage, plate proofs on India incl. imprint and plate no. blocks of fourteen and sixteen in Black, top margin part imprint block of four and three pairs in Orange, Green and Blue, few faults, most all appear Fine-Very Fine, Scott catalogue does not list plate proofs for No. 158, the part imprint on the block of four confirms this as a Continental printing
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