cover -- 1901 (20 Apr.) "Twining"envelope to Tongku bearing 5c. on ½c. with overprint in black and 3p. (2) tied by fine strikes of "F.P.O. NO.20" at left and backstamped F.P.O. No.4; fine

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cover -- 1901 (20 Apr.) "Twining"envelope to Tongku bearing 5c. on ½c. with overprint in black and 3p. (2) tied by fine strikes of "F.P.O. NO.20" at left and backstamped F.P.O. No.4; fine

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