LEGO Modulex Brick 2 x 5 with M on Studs | Brick Owl - LEGO Marketplace
Brito on Twitter: "Lego used to make Modulex, a special cube-based brick for architects in 1963.🧱 The aspect ratio of Lego bricks is 5:6, so the models were not scaled proportionally with
Modulex compatibility - Swooshable
Old Bricks: What is Modulex? | New Elementary: LEGO® parts, sets and techniques