Poland C 53-C56 blocks of 4, MNH Michel 2437-2438, 2484, 2540 Air Post 1976-1979. Contemporary aviation. Jantar gilder, M6 helicopter, PZL-106 Kruk plane, Plane over Warsaw Castle. For domestic purchases up to $60.00 first class mail will be used; purchases above $60.00 require mail with tracking number (buyer pays the mail fee). For international purchases up to $60.00 first class international airmail will be used; purchases over $60.00 require mail with tracking number (registered mail, buyer pays the $23.00 or $26.00 for oversize item). Warning for the buyers from Eastern European countries, Russia, China, Middle East, South Asia, Latin America, Africa exclude RSA, and the buyers with eBay ID less 100: the purchases over $30.00 require expedited mail.