cover 18Kr. brick-red with very good margins, some slight residual gum toning, neatly placed on 1873 entire to Paris cancelled by a fine strike of the single-ring "NÜRNBERG 17/4" d.s. in purple with another strike adjacent together with transit c.d.s. and boxed " P.D." both in red and showing arrival c.d.s. (19/4) on reverse. Very fine and a rarity with a coloured cancellation. Signed Pfenninger. M.19; D.M. 6500 +. Photo in colour