cover SAI YING PUN: 1931 (31 July) commercial envelope to U.S.A. bearing K.G.V 4c. and 10c. tied by type C c.d.s., alongside is a previously unrecorded strike, in Chinese, stating Stamp Insufficient/Due ... Cents and with "T" in circle at foot. The Chinese h.s. has been partly covered by as additional 6c. which is tied by (7 Aug) Hong Kong c.d.s. A fine and desirable cover. Photo