Yep. TIL the Iron Cross is called a “Cross pattée” (or French for “footed cross” bc it widens into feet, see?) and is still used in several national and local coats of arms. After WW1 the German Wehrmacht used the “Balkenkeruz” (“bar cross”) until the end of WW2. But in this cartoon it’s just an “x marks the spot” character, like on a treasure map.