cover 1918 (6 May) cover registered and locally addressed at Peking, bearing 1917 locally surcharged 4c. on 10c. showing variety surcharge double, one inverted, and 1917-18 5c. block of four, all cancelled "R.R.POSTE ITALIANE/PECHINO-CINA" c.d.s.; overprinted registration label at left. Rare. Photo