![Walter Breen's Encyclopedia of United States Half Cents 1793-1857-Publications-StampPhenom-StampPhenom](http://stampphenom.com/cdn/shop/products/10650_{width}x.jpg?v=1606800852)
Known as one of the best reference books on the subject, this 500+ page book is the result of years of research and features hundreds of photos, including many color plates. Walter Breen. ISBN: 0911021000. Pub Date: 12/1/1983. Edition: 1st. Binding: Hardcover. Size: 8.5x11. Pages: 502. Case: 6 .