Classic Soda Machines, 3rd Edition by Jeff Walters.
Soda Machine Pricing and Identification Guide - 328 pages, full color photos, Coca-Cola, Pepsi, Dr. Pepper, 7-Up, Royal Crown, Ideal Sliders, and a few Miscellaneous brands. Covers 1920's through late 1950's.
The guide shows approximate year, dimensions, rarity rating, and average/fully restored condition pricing. 320 Pages. 2500 Photos! Current Price Guide