This is a sign from Westfield Garden State Plaza in Paramus, NJ. It's one of the largest malls in the country and, having opened in 1957, one of its oldest. (The first mall on the East Coast was the now-demolished Harundale Mall in Glen Burnie, dontcha know.) In 2007, its current owner Westfield put up signs around the mall celebrating its 50th anniversary. Westfield's website even boasts of Garden State Plaza's "prestigious history."
In the meantime, fan of Wheaton Plaza "Guinness Steve" started a Facebook group for sharing "stories and memories and most importantly, photos" of the mall's history.
Photo from Wikipedia.