This article is from the Old Time Radio FAQ, by Lou Genco webmaster@old-time.com with numerous contributions by others.
Sometimes broadcasts are dated according to their original
broadcast date, and sometimes according to a date on which they have
been rebroadcast. For instance, the Armed Forces Radio Service
rebroadcast many Mutual Radio transcriptions at a later date. Your
tape may be of one of these later dates. Alternately, somebody might
have made a mis-typopgoof.
Finally, some shows -were- broadcast more than once, and sometimes on
different programs! For instance, a few Suspense shows were
re-scripted / re-cast for Escape. You might also find similarities
between certain SF shows as done on X Minus 1 and Dimension X.
 
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