Q90 January, 2011   member 383 Exposition Medicaments Some time ago I came across this special postmark on a pair of the Medicine Congress stamps of 1928. It reads EXPOSITION MEDICAMENTS INSTRUMENTS APPAREILS CHIRURGICAUX. I don't know of any mentioning of this datestamp in the literature.

Reply 1 January 2011 member 240 see http://www.persee.fr/web/revues/home/prescript/article/pharm_0035-2349_1982_num_70_253_2602