Sign reads CSUN as one approaches California State University Northridge on Nordhoff Street. When you pass it and look back, it still reads CSUN. Which is a much more difficult trick than one would think!

https://foursquare.com/v/csun-sign/4df8eae6b0fb9724c5da1b58

I'm still puzzled as to how Your Brain on Drugs with Two Strips of Bacon, in a Pan, can be a MC from Sacramento. But at least we have an order date, 1964, to play around with. Thanks, Jay.