PULP INTL.

Uncredited cover art for After the Rain, by John Bowen, 1965

All Cats are Grey by Howard Toward (Original Title: Lesbos Hill) Dollar Double 957, 1962 Cover by Robert Bonfils

These were commissioned for various puzzles and other items. And they were painted around the same time that Marvel's Godzilla, King of the Monsters comic and the Hana-Barbera Godzilla cartoon were out, so that may be why Norem's Godzilla looks to be an amalgam of those two.

Robert Emil Schulz, cover art for "Forgotten Planet" by Murray Leinster, 1956

Michael McCann

Cover art by Henry Fox

No Mortgage On A Coffin - Robin Hood Press UK - Darcy Glinto - Circa 1950

Dutch illustrator J.H. Moriën

— Basil Gogos, 1969

"The Curse of a Thousand Kisses" by Sax Rohmer Avon Fantasy Reader No. 7, February 1948 Cover art uncredited

Lo spettro aka Lo spettro de Dr. Hichcock / The Ghost (1963), Riccardo Freda 

Amazing Stories magazine illustration detail (back cover) - December 1943.

Jim Starlin (b. 1949, American) Marvel Preview, Star–Lord (1978)

Walter Popp