1890年汕头大型 一分邮资封(181x111mm), 右上端盖红色粗圈汕头书信馆邮一分戳, 中央有 "PS及汕头" 双语, 戳上加盖一行黑字 "PROVISIONAL", 而信封顶中央印红色 "Swato Postal Service". 此型试样邮资封存世仅三封, 而本封为其中品相最佳者, 难得之极.
Swatow Official Mail 1890 (c.) large buff envelope (181x111mm) bearing a fine strike of the thick outer ring "<H>swatow l.p.o./one cent" handstamp with bilingual "P S" in the centre, with small capital "<H>provisional" struck in black in the centre and showing "<H>swatow postal service" also in red at top. Fine and rare and thought to be the finest of only three such essay covers. Photo
