Indicia reads: The Adventures of Koko and Kola, Christmas issue, 1950. (A-1 No. 28.)
The date entered in the "On Sale Date" field is the copyright date derived from the actual Library of Congress copyright documentation (available on www.archive.org).
Indexed from a scan from http://digitalcomicmuseum.com/index.php.
This issue is part of the A-1 series. Refer to A-1 (Magazine Enterprises, 1945 series) #28 for this issue.
There are no actual Muggsy Mouse stories in this issue.