Yep, it is from the 70s. It's from Marvel Feature #1, the first official appearance of the Defenders, I believe. Ross Andru did the art, and Everett the inks. It's not Everett's usual polished work, because Everett was miffed at the very rough pencils Andru delivered. It was gestural, with many lines, instead of one clean line, and Everett decided to ink EVERY line. LOL! Stan Lee was very mad at Everett, about it.
The nice thing about getting the physical version of comics is that many of the issues have a digital code.