unused 1912-25, Air Post semi-officials (Michel 1, 3, 4a var, 4b, 5, 6, 7 two, 11, 15, 16), unused, most o.g., no. 4a is a B. imperforate single (considered a proof), also incl. similar local air post item unlisted in Michel, some have mostly small faults, otherwise fine-very fine lot, Michel DM 16,075.00 photo ex