California Southern rr - a subsidiary of AT&SF rr- built the original 1887 San Diego California Southern rr depot seen here (demolished 1915), as well as the San Bernardino depot. Several versions of the cross in a circle in a diamond are seen. The upper-most tower symbols seem to resemble the more modern cross in a circle logo of AT&SF. [photo source: Wikipedia open source]
(submitted by Rich A. on 04/05/14)