This book, of course, is dedicated to Longines, and is a reasonable picture reference, with 280 images covering 145 watches, though it is not a complete guide to all models. Longines Watches provides the story of one of the most renowned Swiss watchmakers, with some of the most well-known and important pieces (check out a video of some of Goldberger’s Longines watches). There are full-page images, accompanied by detailed reproductions of cases, dials, movements and calibers.
You may be able to find a copy on Amazon.com
For those who want to go much deeper into the movements of Longines, check out Longines Watch Movements (1832-2007).