Indicia title is "HUCKLEBERRY HOUND FOR PRESIDENT, No. 1141". Copyright 1960 by Hanna-Barbera Productions.
No month is given on the cover or in the indicia. Based on the copyright dates of this issue and others in the series released around the same time, one can determine that this issue was published with other Four Color issues bearing an "October-December" cover date.
On sale date is Library of Congress copyright record publication date.