At first glance, it's easy to assume that all Archie comics art looks alike. But if you look a but closer, there's quite a bit of diversity available even though the characters adhere to the house style. Bill Vigoda, Harry Lucey and Dan DeCarlo, Sr are usually easy for me to spot but this rare story spotlighting Veronica's mother has me stymied as the art style looks like nothing I've ever seen in an Archie strip. Not even sure when it dates from as this was from a 1979 digest reprint.
UPDATE: See comments for more info!