Invincible Detective Magazine
the same publisher under the same series title of which only two undated examples are known - The Counterfeiters by Rex YoungUnited Kingdom1949–195467 issues
IN#V01N02 (1950-January)#V01N02 (1950-January)
- IN#V01N03 (1950-February)
#V01N03 (1950-February)
- IN#V01N04 (1950-March)
#V01N04 (1950-March)
- IN#V01N05 (1950-April)
#V01N05 (1950-April)
- IN#V01N06 (1950-May)
#V01N06 (1950-May)
- IN#V01N07 (1950-June)
#V01N07 (1950-June)
- IN#V01N08 (1950-July)
#V01N08 (1950-July)
- IN#V01N09 (1950-August)
#V01N09 (1950-August)
- IN#V01N10 (1950-September)
#V01N10 (1950-September)
- IN#V01N11 (1950-October)
#V01N11 (1950-October)
- IN#V01N12 (1950-November)
#V01N12 (1950-November)
- IN#V01N13 (1950-December)
#V01N13 (1950-December)