The early versions of this guidebook contained very little factual information as to precious metal content and weights. However, when it became apparent that the value of these issues was more closely tied to the intrinsic metal content, more information was included for both the current and older issues. The 1981 book was a significant improvement over the previous years but the 1982 Guidebook contained even more information about older issues. This was the last guidebook as the Franklin Mint sold very few (if any) new silver or gold issues after 1982 so this book and my summary is as complete as it gets.