# Cover Front Thb Cover Back Thb Postmark Year Postmark Month Postmark Day Postmark City Postmark State Mailed To State Actions
501 1912 12 13 Broomfield CO KS
502 1948 9 22 Brighton CO
503 1917 6 26 Brighton CO CO
504 1910 9 9 Brighton CO CO
505 1897 12 15 Florence CO ME
506 1896 5 5 Box Elder CO PA
507 1936 6 8 Boulder CO CO
508 1955 2 16 Boulder CO UT
509 1951 12 19 Boulder CO
510 1948 8 20 Boulder CO