The 1950... - Unofficial LEGO Sets/Parts Collectors Guide | Facebook
Nate Poulin on X: "9/ The big LEGO breakthrough happens when in 1947 Christianson comes across a British toy: "Kiddicraft Self-Locking Building Bricks" Christianson creates his own version of the plastic brick
Automatic Binding Brick | Brickipedia | Fandom
First Versions: LEGO
Automatic Binding Bricks - The Oldest LEGO Sets - General LEGO Discussion - Eurobricks Forums