Dating Vintage LEGO Sets: Brick Stamps, Mold Marks & Part Numbers
Identify LEGO brick age using “Pat. Pend.” stamps (1958-1962), part number 3001, hollow studs (1990-1995), and 2004’s duller grey shift. See the full dating clues.
Identify LEGO brick age using “Pat. Pend.” stamps (1958-1962), part number 3001, hollow studs (1990-1995), and 2004’s duller grey shift. See the full dating clues.