The Postal Commemorative Society issued this collection of commemorative panels in honor of the nation's First Ladies.  Each panel has a U.S. stamp featuring the President at the time, and the panel describes the First Lady at the time.  Not all of the panels have an actual "First Lady" - example:  James Buchannan was a bachelor President, so his niece filled the role of First Lady during his administration.
 
There are a total of 44 panels in this collection - from Martha Washington through Laura Bush.  The collection is in excellent condition and is in its original binder with all panels included.