1890年汕头书信馆一仙试样邮资封, 邮资戳为红色双圈设计, 中间有"PS" 及中文 "汕头" 字样, 戳下印黑色全大楷 "PROVISIONAL" 小字, 而信面上端中央印有红色 "SWATOW POSTAL SERVICE"; 样封保存完好, 此件相信为存世仅两件之一, 十分珍贵. 源流: 2014年11月Flling O. Eide.SwatowOfficial MailEssays1890 (c.) envelope bearing a fine strike of the double-ring swatow l.p.o./one cent handstamp with bilingual P S in the centre, with small capitals provisional struck in black in the centre and showing swatow postal service also in red at top. Fine and thought to be one of only two such essay covers. Livingston B2. Photo
