Jernbane railway, 4 Sk brown single Ferslew print on envelope, full margins, clear mute cancelled and railway exp. mark KJOBENHAVN 30/9/1851 IRB. PST. EXP. alongside, tiny border toned, fine, certificate Grønlund
6; Europa A-Z; DÄNEMARK; Markenausgaben
6; Europe A-Z; DENMARK; Stamp issues