This may be the 1946 issue that Overstreet considers the "non-Ribtickler" 1946 issue, but since the other cover exists in two versions, only one of which is a rebound Ribtickler, that is not entirely clear.
A seller of this issue claimed that it was Canadian in some way, but this has never been confirmed so the issue is grouped into this series for now.
It is suspected that this is a non-numbered issue, but there is the possibility that it may be numbered #1 in the indicia, depending on how much the inside front cover matches the recycled outside cover.