1920, Konstantinopel complete set of five values plus Mi. 6 without overprint on registered stamp dealer envelope tied by POSTES ROUMAINES CONSTANTINOPLE 25.5.920, addressed to Germany with violet twoliner “Vom Auslande über Dresden” and threeliner “Zurück / Einfuhr von Briefmarken verboten 4”, on reverse torn German postal label for opening and control, retour to Turkey with arrival mark POSTES ROUMAINES CONSTANTINOPLE 20.8.920 on reverse, few crease, one stamp toned perfs, otherwise fine, a very scarce usage and destination of this issue, shipping to countries other than Romania is unrecorded in PROFI
