24 - The Short-Wave Mystery
Major Edition Types
BACK
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| Type | Years | Text | Cover | Spine | Art | Endpaper |
| A | 1945-50 | Original | Brown | Yellow | Tandy | Orange Gretta |
| B | 1951-58 | Tan | ||||
| C | 1958-61 | Brown multi-scene | ||||
| D | 1962-65 | PC | Blue | Leone | ||
| E | 1966-79 | revised | White multi-scene | |||
| F | 1979-87 | Cameo | ||||
| G | 1987-Date | Flashlight PC | Blank | |||
Major Variants
1945 - Maroon binding & endpapers 1959 - off-center cut, dark brown multi-scene endpapers | ||||||