Based on the 1960-1966 television series of the same name produced by William Hanna and Joseph Barbera.
******* 'Canadian' price variants of 1968 *******
Doug Sulipa, a comics dealer in Manitoba, Canada since 1970, has confirmed that about 90% of all 63 titles of Gold Key Canadian titles are confirmed to exist with cover dates from April 1968 through August 1968 for both 15 cent covers and 12 cent covers. Joe Torcivia, a comics collector and professional, has confirmed that at least several titles were sold in Flushing, Queens, New York with 15 cent covers while sold elsewhere with 12 cent covers. A few months later (September or November issues, depending on dating), ALL Gold Key Comics carried the 15-cent cover price and no further 12 cent issues were sold again. These issues do not have a currency qualifier on the covers, so it is not certain whether they were priced in Canadian or United States currency, or both. These issues appear to meet comics researcher John McClure's definition of Type 1a variants: “Cover Price Variants intended for foreign distribution with limited regional distribution, published simultaneously with standard or regular editions." However, in addition to foreign distribution, they appear to have also been sold as a test market for an impending price increase in the United States.