Here's a nice image of the Howler's circled by what I guess are their German counterparts. For some reason I'm tempted to reverse the logos and present it as the rare Earth-X comic BARON STRUCKER AND HIS BLITZKREIG SQUAD. Although I thought the character was better when they brought him into the modern age as Oberst Strucker, Agent of S.C.H.I.L.D.
The Kirby checklist lists this as Colletta inks, but I'm not seeing it at all. GCD seems to be down, so I can't cross-check there, but I'm thinking Ayers.