1873, 30¢ gray black + 10¢ brown (pair) + 1875, 2¢ vermilion (pair) + 5¢ blue. Tied by cork cancels on an 1877 registered oversize yellow cover from Boston to Quebec, Canada; cover with light file folds and large sealed tears, reduced on 3 sides, otherwise F.-V.F., an attractive and unusual 4-color franking; with 2006 P.F. certificate. Scott No. 165+161+178+179  Estimate $300 - 400. $0 (Image)