Lot 586
ISTANBUL: "DERSAADET / STANBOUL", bilingual blue oval postmark on 1892, 20 pa. and 1 pia. on registered envelope with very rare square Turkish-only register mark "DERSAADET TAAHHUD", dark pink register label and blue boxed bilingual "RECOMMANDEE"; the envelope small tear at top and slight marginal faults, otherwise fine; a very unusual registered letter
