6 Pfg numerals with net pattern overprint, of the main post office not acknowledged provisional issue, on postage exceeding tariff rate registered letter in mixed franking with 6 x2 and 4 x 12 Pfg worker with net pattern overprint, from PASSAU 10.9.48 to Bernau, reverse arrival postmark 19.9.48, old photo expertize H. G. Schlegel "stamps and cancel are genuine, defects are indistinguishable