Major Thorpe (writer and artist), Mort Leav (pencils and inks)
Published in Jumbo Comics #51, May 1943 - 8 pagesThe French are sending a shipment of gold to Switzerland for safekeeping. Nazi spies, led by a notorious Van Loomis, are determined to steal it. ZX-5 with on hand with the lovely Martinique to stop them
Here are the pages I have of it.