Lot
336 
Panama, 1888, Registration, 10c black on gray, blue "6817" handstamp, used with Panama 10c black on yellow (11), tied by "Panama, 2 Jul 1888" duplex on telegraph imprint cover to Venezuela, "Certificado" framed handstamp; minor paper loss at left, Very Fine. Scott No. Panama F1 + 11 Estimate $750 - 1,000.
THE EARLIEST RECORDED USE OF THE NEW PANAMA F1 REGISTRY LABEL ON COVER ABROAD.
Realized: $1,000