This comic was included free with the Aurora Model Kit of Superman.
On sale date from the Catalog of Copyright Entries, Books and Pamphlets, 1974.
There is no strict indicia, but the inside front cover says:
(c) 1974 Aurora Products Corp., West Hempstead, N.Y. 11552
(c) 1974 National Periodical Publications, Inc.
Made and Printed in U.S.A.