Michel: 520-23c, Scott: C193-96c, Yvert: PA90-93 (Invitation to the opening of the airport terminal) size:
284
Michel: 520-23c, Scott: C193-96c, Yvert: PA90-93 (Commemoration of the opening of the airport terminal) size:
450
Michel: 520-23c, Scott: C193-96c, Yvert: PA90-93 (First Day Cover) size:
331
Michel: 520-23i, Scott: C193-96i, Yvert: PA90i-93i (Imperforate Pairs)
Michel: 520i, Scott: C193i (Imperforate Pairs) size: 114
Michel: 521i, Scott: C194i (Imperforate Pairs) size: 109
Michel: 522i, Scott: C195i (Imperforate Pairs) size: 107
Michel: 523i, Scott: C196i (Imperforate Pairs) size: 107