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. As the collection grows, you should keep track of the pieces you purchase. The information recorded can be used for future references for many reasons. Sometimes it's important information to know and sometimes it's just fun to remember. Also tracking what you have helps to fulfill a "set" or series within your collection. For instance it's good to know if you need one or two specific Saws to complete a set of a particular type or style. There's certainly nothing wrong with having a few duplicates in your collection (some collectors strive for it), but purchasing something extra should be an informed decision and not something that happens accidentally. Otherwise, you're wasting money that could be spent on an entirely new item. Having to many of one particular size and type can quickly get out of hand. There are some Saws that are just a lot more abundant than others and knowing what you have and what you need is important. You can also use a particular catalog or catalog reprint as a reference to collect a catalog or manufactures set of Saws. Knowing what's already in your collection will help remind you of what you don't have. Say you're creating a list of items that are a part of a smaller series within your collection (i.e., a specific author within a book collection). By looking at what you have, anything you're lacking will stand out. This will make it easier to create a separate and more accurate wish list. Jotting down a list of things to look out for is great, but without knowing what you already have, it's easy to leave something off your list.