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...