box of about 1,200 mixed US covers, first approximately 700 ship and naval covers (including special events, Arctic expeditions, paquetbot, etc.), followed by about 500 assorted covers primarily from the 1880s to 1920s, including advertising, official mail, stationery entires, mourning covers from the Banknote era, and much more, generally fine to very fine, should prove interesting and worthwhile with a closer look