NFLD 5c Seal Trial Color Plate Proof Block, Scott 25TC variety, catalogue $800
Both Unitrade and Minuse and Pratt record the black trial color proof on thin card only. This example is on India paper and is therefore a rare, unlisted variety. 13% - NB, NL, ON. 5% - AB, BC, MB, NT, NU, QC, SK, YT.