# Cover Front Thb Cover Back Thb Postmark Year Postmark Month Postmark Day Postmark City Postmark State Mailed To State Actions
11 1899 12 26 Longmont CO CO
12 1893 12 1 Fort Collins CO CO
13 1885 9 4 Denver CO CO
14 1885 3 22 Fort Lupton CO CO
15 1953 12 7 Denver CO
16 1994 5 6 Englewood CO CO
17 1954 5 6 Denver CO DC
18 1942 3 21 Calhan CO DC
19 1918 11 30 Denver CO CO
20 1904 3 11 Denver CO PA