1895年3月12日福州寄美国封, 盖清晰方框型红色邮资已付戳, 其上再盖福州代办所"T"字福州日戳, 加贴1890-93年5仙票, 销3月23日上海美国客邮代办日戳, 在封背有较模糊的3月15日蓝色上海工部日戳, 4月12日三藩市中转戳, 及4月18日Baltimore到达戳. 封背的右上角虽有缺失, 但绝无影响这封的重要性. 这由于在甲午战争时期, 及福州书信馆邮票发行前, 盖有此方框型邮资已付戳的实寄封存世只两件, 此为其一. 源流: 1988年12月Richard canman.FoochowShanghai AgencyThrough Foreign Post OfficesUnited States1895 (12 Mar.) envelope to U.S.A. bearing a good strike of the framed PAID in carmine-rose overstruck by a light strike of the Agency Foochow c.d.s. code T and with U.S. 1890-93 5c. Grant tied by the U.S. Postal Agency Shanghai duplex (23.3) and, on the reverse, faint Shanghai Local Post c.d.s. (15.3), San Francisco (12.4) and Baltimore arrival (18.4) c.d.s.; a fragment of the back corner is missing which does not spoil this important cover.One of only two known covers used during the Sino-Japanese war in the pre-adhesive period with the postage Paid handstamp. Photo