The Indonesian Postage Stamps of Revolution Series Printed Overseas

These postage stamps consist of :

• Postage stamps printed in Austria by the Staats Druckerei di Vienna using the photo engraving method.
• Postage stamps printed in USA be the E.W. Wright Bank Note Company Philadelphia using the steel engraving method. These postage stamps consist of three high values (5, 10, and 25 rupiah) and blockade series.

Through individual contracts with several countries, ordinary and registered letters reach overseas countires included USA. The postage stamps printed at that time included the following :

• Airmail postage stamps potrayed beautiful scene and the glory of the Indonesian Air force, used for overseas mail and were aimed at making the Indonesian Republic known.
• Postage stamps for overseas mail which bore the inscription "RESMI" (official) were used for specific requirements.
• Postage stamps to commemorate the failure of the Dutch blockade. These postage stamps dipicted the penetration of the Dutch blockade, both in the air an on the sea by showing harbour and airfields.
• Postage stamps which were repeat orders and bore the letters "oe" which later became "u".
• Postage stamps with the isncription "pos udara" (airmail) which were issued on 17th August 1949 after the Dutch Army left Yogyakarta.

At first it was planned to circulate these postage stamps on 15th December 1948, but due to some difficulties, the selling of the postage stamps at the post office of Yogyakarta started on 17th December 1949. The selling period of these stamps ended on 1st March 1950 but it could be used up to 1st August 1951.