cover 1906 (26 Mar.) 10c. registered XU5 (size F) to Shanghai, bearing K.E. 1c., 5c. and 10c., all cancelled by boxed "PORT EDWARD/WEI-HAI-WEI" d.s. (Type F) in violet and showing just legible 30mm long "R/.../.." registration cachet. Extremely rare, only three examples of this registration h.s. believed to exist. Photo