Accum abt (1400+) nearly all 20th Cent w/ much 1930s-50s considerable May 15-21, 1938 National Air Mail Week plus anniversaries, days, dedications, air/Zepp flights, conventions, WWII patriotic, societies & assorted more, most diff covers, PPC & misc other, most nice mainly R/S cachets, varied cond gen F-VF