In commentary to Part I, Bob Gale debunked speculation by some fans that "Zale's" was a hybrid of the names of Robert Zemeckis and Bob Gale, and noted that it was product placement.
The jewelry store chain was found in 1924 by brothers Morris Zale and William Zale. At some point between 1955 and 1985, it lost the apostrophe, changing its signs from "Zale's" to "Zales".
An advertisement for Zales Jewelers can be seen on the bench that Marty and Jennifer are standing upon as they talk about going to the lake. The ad has the store's 1985 slogan, "Leading with Style", and the note that it is "Now in Twin Pines Mall".