1924, Aviation School, 10c, 25c and 2b, imperforated set of three, nice margins all around, full OG, LH, VF, only 100 imperforated stamps of each denomination were produced, Sanabria #8, 10 and 12, C.v. $600 (1966)

200.00

1930, Aviation School, red Zeppelin overprint on 25c dark blue and black, horizontal pair, left stamp with inverted overprint, while right one has double overprint, full OG, LH, VF and extremely rare, only a few such errors possible