The Jordan-LeBron dual version shows how far the Number Pieces concept had evolved by 2006. What started as a smart solo design idea becomes a deliberate cross-era centerpiece family once the set begins pairing icons inside the same serial-numbered language.
Number Pieces and NumbersText, Number, and Letter Inserts/23Michael JordanLeBron James
Listed on the linked TCDB checklist entry for the Number Pieces branch. Number Pieces is one of the best examples of 2006 using player-specific numbering as actual design language, not just a stats note. Source note: Signed memorabilia insert numbered to the quantity shown on the card line, generally tied to the player's uniform number or selected numeral.
Number Pieces and NumbersText, Number, and Letter Inserts/23Michael Jordan