1885 (August 28), three 1pi black & blue, perforated 13.5, two on reverse, all tied to registered cover to Arthur Maury in Paris by blue circular grid cancels, neatly-struck “Poste Yamboli” despatch c.d.s., black Constantinople transit backstamp and multiple Paris c.d.s., a scarce cover paying the 2pi foreign letter rate for the second weight class with 1pi registration fee, most attractive.
