大沽海关：大面积封背，贴叁分银紫色十二方连，销蓝色上海邮戳，另盖完整紫色外双圈大沽海关戳，另有些不完整的外地邮戳，这方连的底行属未知的版式子模9及7，(可能是第七或第八版式); 盖销这类罕见邮戳的难得㤡子.。1885-88 Small Dragon Issues，Postmarks，Taku，Customs: 1888 (6 July) large part envelope back bearing 3ca. mauve block of twelve cancelled by Shanghai seal in blue and bearing a light and complete strike of the double outer circle "<H>customs/taku"， in purple; fragments of other postmarks indicate overseas destination. The block includes clichés 9 and 7 in the lower row, from an unknown setting, possibly either VII, VIII or X. An appealing example of this scarce postmark. Photo
