Throughout most of Shea Stadium’s existence (except for the last couple of years, when Citifield was being constructed) a large, four-sided clock tower was visible beyond the left-field fence with a flashing neon sign. This was the Serval Zipper Factory, for the past few years a U-Haul distributorship. The clocks, of course, stopped long ago.
The structure was originally the Queens office/factory of W & J. Sloane Furniture Co. on Lawrence St. (now College Point Blvd.) in Flushing.