cover 18Kr. bright vermilion, with very good margins on 1868 entire (heavy horizontal filing crease) to London, clearly cancelled by cogwheel "356" and showing double-ring "NÜRNBERG BHF 22/DEC." d.s. and arrival c.d.s. adjacent. Fine and a very scarce single franking. Signed Pfenninger. M.13a; D.M. 4,000. Photo