CluesUnited States1926–1943221 issues
CL#V22N04 (1931-January)#V22N04 (1931-January)
- CL#V23N01 (1931-January)
#V23N01 (1931-January)
- CL#V23N02 (1931-February)
#V23N02 (1931-February)
- CL#V23N03 (1931-February)
#V23N03 (1931-February)
- CL#V23N04 (1931-March)
#V23N04 (1931-March)
- CL#V24N01 (1931-March)
#V24N01 (1931-March)
- CL#V24N02 (1931-April)
#V24N02 (1931-April)
- CL#V24N03 (1931-April)
#V24N03 (1931-April)
- CL#V24N04 (1931-May)
#V24N04 (1931-May)
- CL#V25N01 (1931-May)
#V25N01 (1931-May)
- CL#V25N02 (1931-June)
#V25N02 (1931-June)
- CL#V25N03 (1931-July)
#V25N03 (1931-July)
- CL#V25N04 (1931-August)
#V25N04 (1931-August)
- CL#V26N01 (1931-September)
#V26N01 (1931-September)
- CL#V26N02 (1931-October)
#V26N02 (1931-October)
- CL1931-November
1931-November
- CL#V26N03 (1931-November)
#V26N03 (1931-November)
- CL#V26N04 (1931-December)
#V26N04 (1931-December)