This book is sized to be carried in the field while at the flea markets, antique shops or auctions.Keeping track of your collection is an important task in your collection. This workbook is a collection and listing of all Union planes in the Union 1905 catalog. If you collect more than Union Planes there are empty inventory spaces for other brand planes or multiple plane entries. There are also pages of empty inventory spaces after some of the common sections. For multiple pieces of the same number or type, a simple note similar to "Type 3 #4 on page 103" would remind you that your second or third #4 was listed on the other page of blank list on page 103.This could also be something like "Stanley Type 3 #4 on page 103" which would remind you that you have an addition Stanley smoother on page 103.I includes a rarity guide for the Union planes listed in the book.