1916, 1 pia. registered postal stationery envelope, large type, used uprated ‘valeur declaree’ performing 15 pia. 10 pa. rate tied by GALATA 20-17/9/16 cds., boxed all arabic censor Galata and violet censor mark Zemun, bulgarian transit ‘TZARIBROD-GARE 20.9.16’, to Wien 26.9.16 with arrival mark on reverse, intact red wax seals ‘Marcus’, ms. ‘Wert 1800’, vertical folds, otherwise fine and scarce (Isfila AN124)