Movie Classic #12-750-301. The cover reads "6 Black Horses", while the indicia reads "Six Black Horses".
Although there is no month given in the indicia, the last 3 digits of the cover code (12-750-301) indicates a cover date of [196]3-01, i.e. January 1963.
On sale date is Library of Congress copyright record publication date. This movie was released in the U.S. on April 24, 1962.
Comic is 36 pages, but has variant editions with different back covers, either "The Apache Tribes" or "Daisy Air Rifles" ad.