1884 (November 9), three 1pi black & blue, perforated 13.5, tied to registered cover to Prague by blue grid cancel, fine Poste Slivno c.d.s. despatch above, black “Constantinople-Galata / Départ” (25 Nov) transit on front, reverse with two faint c.d.s. and Prague c.d.s. receiver (28 Nov), a few trivial edge flaws of no importance given the scarcity of this striking cover, paying the 1pi registered letter fee and 2pi foreign letter rate for the second weight class.
