This issue is listed as part of two series; see also Kerry Drake Detective Cases (Magazine Enterprises, 1944 series). Gary Watson suggests that this issue preceded the other un-numbered A-1 issue as the other matches the cover format of issues #3-10.
The date entered in the "On Sale Date" field for the A-1 series is the copyright date derived from the actual Library of Congress copyright documentation (available on
www.archive.org). Of the 139 issues of A-1, copyright dates are missing for A-1 #1, 2, 4, 6, 7, 9, 11, 12, 15, 31, 55, 77, 88, 91, 108, 121, 123, 127, 129, 134, and 137. Copyright dates for those missing issues can be extrapolated from surrounding issues. Cover dates with no month can be estimated using the copyright dates. The copyright date for this issue is estimated.