The Gruen Watch Model Identification Guide Volume 2 was 3 years in the works and extends the only full-color series of Gruen Model ID guides. Volume 2 used same laborious process of utilizing Gruen published advertising material to obtain the images and the accompanying data. The result is a very accurate guide that's stunning to see. This is not a ""Price Guide"". The only prices are the ones the watches originally sold for. But the illustrations are better than anything you've seen in price guides. The book's title describes exactly what the books are for -- Gruen Watch Model Identification Guide. Use these books to identify your Gruen watch, when it was made, other variations, plus quite a bit of technical data. These books have been described as ""Coffee Table"" books because they're so detailed and are in color. Enjoy all of the hard work the men and women of the Gruen Company put into their timepieces.