Virginia Central R.R. May 13, clear strike of route agent cds on 3¢ red (U2) entire to San Francisco Cal., manuscript "Due 15" rating; some edge wear, Very Fine and rare railroad post office use. Estimate  $500 - 750. This double-eight cover was credited with half of the first ½ oz. prepaid 3¢, plus half of first ½ oz. unpaid 5¢ plus the second ½ oz. unpaid 10¢ for a total due of 15¢. This is a very usual treatment of the short payment. $0 (Image)