cover 2sk. (1st printing), 3sk. (2nd printing), 4sk. (2nd or 3rd printing) and 8sk. (1st printing) on 1871, (Oct.) E. from Copenhagen to Helsingtors, Finland via St. Petersburg, cancelled by "34/KJOBENHAVN S.J.P." duplex and showing scarce "WAMDRUP/FLENSBURG" T.P.O. d.s. on reverse. A rare and attractive four colour franking. F.20a, 21b, 22b, 23a. Photo.