A completely new Guide Book for the collector of Unipart porcelain insulators showing COLOR photographs of each of the 1012 styles. The Unipart Style Chart has been simplified by eliminating most of the trimmer variants and style numbers previously assigned to catalog styles that do not match actual specimens making identification easier. Nearly 500 historic and other photos are included, many in color! MUCH MORE! Manufacturer histories have been greatly expanded plus details of 286 markings. The Guide Book does not have any values. Guide Book: $49 plus $5 shipping.