Stamps of United States, 5 base month
1 to 50 of 710
postage
1901, May 1 Pan-American issue wmk. double line USPS p. 12 (6 stamps)
1920, May 26 unwmk p. 10x11
| X | 1c | grn | Washington |
1924, May 1 Huguenot-Walloon issue p. 11
| X | 1c | dkgrn | ship Nieu Netherland | |||
| X | 2c | carrose | Walloons landing at Fort Orange | |||
| X | 5c | dkbl | Jan Ribault monument |
1925, May 18 Norse-American issue
| X | 2c | car & blk | sloop Restaurationen | |||
| X | 5c | dkbl & blk | Viking ship replica |
1926, May 10
| X | 2c | carrose | Liberty Bell |
1926, May 29
| X | 5c | graylil | John Ericsson monument |
1928, May 26
| X | 2c | carrose | Valley Forge |
1929, May 1 Kansas issue ovpted flat plate print (11 stamps)
1929, May 1 Nebraska issue ovpted flat plate print (11 stamps)
1929, May 25 p. 11x10.5
| - | 1/2c | olbrn | Nathan Hale | .20 | .20 |
1931, May 21 American Red Cross 50th issue p. 11
| X | 2c | blk & red | The Greatest Mother |
1933, May 25 Century of Progress issue
| X | 1c | yelgrn | Fort Dearborn, p. 10.5x11 | .20 | .20 | |
| - | 1c | yelgrn | Fort Dearborn, imperf | .20 | .20 | |
| X | 3c | vio | Federal Building Chicago, p. 10.5x11 | .20 | .20 | |
| - | 3c | vio | Federal Building Chicago, imperf | .20 | .20 |
1934, May 2
| X | 3c | dpvio | Whistler's Mother, p. 11 | |||
| X | 3c | dpvio | Whistler's Mother, p. 11x10.5 |
1935, May 29 California-Pacific Exposition issue
| X | 3c | dklil | View of San Diego Exposition |
1936, May 4 Rhode Island 300th issue p. 10.5x11
| X | 3c | dlpur | Roger Williams |
1936, May 9 third philatelic exhibition x issue (no perf info)
| X | 3c | redpur | .20 | .20 |
1936, May 9 TIPEX issue imperf
| - | 3c | vio | ||||
| - | 3c | vio |
1 to 50 of 710