Bosnia

(*),,Bosnia. Postage Due, trial print. All five imperforate pairs of two different values se-tenat (2 + 6, 4 + 7, 10 + 5, 15 + 20 in 50 + 8 hel.). Stamps are without gum, as issued. The pair of 15 + 20 hel. has a slight thin spot in paper. As complete run of five pairs rare.