50 on 30 Gr overprint stamp besides further overprint stamps, together 2, 08 Zl ( = 1, 04 RM) being a correctly franked for special delivery registered with Berlin pneumatic post from Cracow 25. 4. 40 to Berlin-Tempelhof, arrival cancel 26. 4. 40 20-21 h. Receiver is a Postrat the Empire postal service. Therefore kenned the sender adress surely the pneumatic post characteristics in Berlin. Remarkable manner inside only some day delivered! - 26, 33 I, 34, 37, 38