Clock Towers, aka Keuffel & Esser Building. The first conversion of industrial space to residential use, a practice known today as adaptive reuse. Located at 300 Adams Street Hoboken, N.J. It's not L.A. I know, but it did pave the way of adaptive reuse, why many of the noir buildings in L.A. still exist.
http://maps.google.com/maps?q=300+Ad...47rkLNqjgLMuYA