WRme2: Main timeline of 2x4 mold versions (no complete overview)
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WRme2: SLOTTED BRICKS
WRme2: Moving molds
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WRme2: HOLLOW BRICKS
WRme2: Hollow Brick Identification Chart
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WRme2: BRICKS WITH TUBES
WRme2: Early bricks with tubes - mold identification with letter + number
WRme2: Minitalia 2x4
WRme2: 3001old with mold pip on the stud
WRme2: 3001old with split tubes
WRme2: 3001 with split tubes - Inner wall variations on mold numbers 77 to 96
WRme2: 3001 without cross support - number inside tubes
WRme2: 3001 without cross support - pip stud - number above and below tubes
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WRme2: BRICKS WITH TUBES AND CROSS-SUPPORT
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WRme2: TEST BRICKS AND OTHER ODDITIES
WRme2: Test molds in the production process
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WRme2: Suspected and known origins of test bricks
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WRme2: Quick reference guide
WRme2: 3001old in odd colors - Work in progress
WRme2: Grangemouth test bricks
WRme2: UK test bricks of unknown origin
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WRme2: Test bricks found in the Netherlands
WRme2: List of known colors for the LEGO 2x4 bricks
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WRme2: Test bricks found in the United Kingdom
WRme2: LEGO House mold 805 statistics...
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WRme2: Where was my brick made?
WRme2: Stud logos found on Pat.Pend. 2x4 bricks without cross-support
WRme2: LEGO process and their special parts
WRme2: A limited collection....