Iran: circa 1916 cover from an interpreter in French Mountain Ambulance Unit at Urmia to Paris endorsed F.M. and struck by Le Chef De La Mission Francaise and Mission Sanitaire Francaise Russie hand cachets. Reverse Red Cross hand cachet in Cyrillic. French activity during the First World War in Persia is extremely rare. This French unit was attached as medical support to the Russian forces in Transcaucasia that were sent to block Ottoman incursions. Apparently only recorded.
