GREECE: 1921 very rare postal receipt for registered letter sent from Priboj Serbia for total postage of 45para (25p for the letter and 20p for registration) with circular bilingual "ΠΡΝΒΟJ PRIBOY/ BOJNA POWTA/ -7.4.21" postmark used during the Balkan wars of 1912-1913 period (due to lack of new cancelations for registered mail until 1923).
MILITARY CANCELLATIONS - Serbian military post-offices |