The list author says: "The King James Version (KJV) Nelson Study Bible is one of the most highly-regarded (and ranked) scholarly study bibles available today. This list puts all of them at your fingertips, including important details.
WARNING! Older thumb-indexed editions have a minor defect and as a result most are offered at a greatly reduced price (list price $20 below the none-indexed editions). Some outside-edge letters are cropped by the indexing tabs. All thumb-indexed editions are placed at the end of this list (after the Signature Series editions). As of June 2009 there are no thumb-indexed editions in print."