The Erector sets were every boy's dream toy back in the 1950's.  This original set has never been used (was in storage for 70 years), and has all of the original parts.  Included is a booklet which shows the number of projects that can be assembled using this one container of parts and pieces.  Includes a letter from the inventor, A.C. Gilbert explaining a little about how to construct some of the models.  A true classic for the toy collector.  The exterior of the metal case is showing some wear, but the inside and all of the parts look great.  It also appears the booklet was perhaps read thoroughly a few times - no tears or stains, just a little crease along the outside edge leads me to that conclusion.