1851. 4 RBS Ferslew. Plate II, no. 76. APRIL-COVER from Odense 8.4.1851 to København. Sent on the exact same day as the instruction to PEN-CANC. the letters was issued. Perfect mute canc. and upright 1 1/2-ring ODENSE 8.4.1851. Very rare cover. Cert. Nielsen [ 1 ] [ ✉ ]