unused 1923-31 collection including 1923-26 set, 1928-29 set with some line perfs. and 2c. marginal block of six with misplaced perfs., 1929-31 set with 1c. imperf. pair, 1929 3c. on 6c. pane of twenty-five, 1931 Air set with and without watermark, and 1931 set, mint and generally fine