cover 1921 (24 Oct.) "CHINA" 10c. registered envelope (creases and soiled) uprated with 8c. and 20c. and addressed to Bury, cancelled by the double-circle British Post Office c.d.s. and bears a fine strike of the scarce "SWATOW.B.P.O." boxed registered handstamp. Webb's Scarcity Guide recorded ten or less. Photo