Suspected and Known Origins of Test Bricks
We currently know (or strongly suspect) that test bricks were made and used at the following locations. Links to albums …
Quick Reference Guide – Is This a Test Brick?
“Is the brick I found special?” Part numbers: 3001old, 3001 and 3001special as used on BrickLink (but excluding the 3001oldf1 …
Test Molds in the Production Process
While we do not know how LEGO works exactly, we can make a reasonable guess about how the material flow …
3001 Old – 343 to 350 Inside Tubes
Unusual colors – found in Germany by Thomas Modern logo Inner ribs: Visible as a frosted line on both the …
Modulex Mold Types (Part 2: Position Numbers)
There seem to be five different molds: Old-LEGO-logo: A (1-14) Pat. pend B (1-14) Pat. pend, sometimes erased CA plastic, …
Modulex 2×4 Molds (Part 1: Colors)
There seem to be five different molds: Old-LEGO-logo: A (1-14) Pat. pend B (1-14) Pat. pend, sometimes erased CA plastic, …
Bricks With Cross-Support, Mold 174 Details
I found a few variations for mold 174. With good light and some magnification, the erased mold numbers can often …
Bricks With Cross-Support, Mold 133
Logo: modern logo Material: ABS Inner wall: thin with vertical ridges Inner ribs: Between the outer ridges on the long …
Bricks With Cross-Support, Mold 181
Logo: modern logo Material: ABS Inner wall: thin with vertical ridges Inner ribs: Between the outer ridges on the long …
Modulex Color Timeline
Modulex started out in 1963 with earthy colors for architectural planning. Modulex broke off from TLG and became its own …