Westerns Volume Four by Adrian Curtis and Tom Sawyer. Complete Detail Differences for Western Class 52 locomotives D1000-73. This publication is FREE to all those who collect all 74 Western Chronicle books, as a way of saying thank you for your support. All 74 must be collected in order to get this publication which will be published to coincide with the completion of the project. Dealing with every facet of detail changes on the Western class, it will be perfect for the modeller and marks the end of a quartet of books that will be recognised as a lasting legacy from two Western fanatics who have devoted their lives to researching and sharing information about the fleet.