CSA 13, 20¢ green pair, 3 large margins to close at left, tied by STAUNTON Va. circular datestamp on repaired and reduced legal-sized cover to Leakesville NC. Pairs of the 20¢ green paying the non-Trans-Mississippi rate, despite the small difference in catalog value, are far scarcer than the 40¢ Trans-Mississippi rate, 1976 PF certificate. SCV $4,750. $1,300.