by Kalton C. Lahue. Published 1973; Spotlite Book No. 630. Softcover, 4 x 6-1/2", 64 pages, b&w illustrations.
Although this is only a very small booklet, it is invaluable for Retina identification.

The book is new, but due to age shows very mild shelf-life wear on cover and often has an old sticker on cover.

Includes:
*Complete Retina History
*How to identify the cameras
*The Retina impact on America
*Full information on all the configuration differences
*Includes Retinette models
*Complete identification photos and specifications of all models