1890年红色汕头书信馆一仙试样邮资戳, 为双圈设计, 中间有"PS" 及中文 "汕头" 字样, 盖于一剪片上, 戳下印黑色细幼小楷 "Provisional" 一字, 罕见. 源流: 1997年10月E.N. Lane, 2014年11月Flling O. Eide.SwatowOfficial MailEssays1890 (c.) swatow l.p.o./one centdouble-ring circular handstamp in red with bilingual P S in centre, struck on small piece with Provisional printed in centre in small serif letters. Fine. Livingston B1. Photo