Teledyne Geotronics was the aerial photograph component of Teledyne, Inc., and their office was located in Long Beach, California. The Teledyne Geotronics aerial photography was part of a major gift from the Teledyne Foundation to the Library in 1986. This gift comprised photography from the following companies: Fairchild Aerial Surveys, Teledyne Geotronics & Geotronics of Monrovia, International Mapping Company, Pacific Air Industries, Universe Air, and Watson Photo Studios.
The Watson, Teledyne, and PAI collections also include oblique aerial imagery, as well as ground-level photographs of Southern California architecture, events, and personalities of the 1930's through 1960's. During 2016 and 2017, portions of this collection were scanned with a grant from the John Randolph Haynes and Dora Haynes Foundation.
The flight IDs for imagery produced by Teledyne Geotronics and Geotronics of Monrovia have the prefix TG, and some flight IDs for this part of the collection end with a “V” (e.g., TG-77V). More than 300 flight IDs are cataloged, with coverage primarily concentrated in Los Angeles and surrounding southern California counties. Other areas of coverage include several north-eastern states (such as Connecticut, Massachusetts, and New Jersey), Arizona and Nevada, and international locations such as Mexico and Vietnam.
The formats of TG photography in SRC are paper print and/or negative film (primarily on rolls). The collection also includes oblique photography of San Diego, Naples, and Huntington Harbor, as well as 4 by 5 inch negatives (currently described as MSS.345).