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Fantastic Brick: Lego 2x4 test brick - PLA
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Fantastic Brick: Lego 2x4 test brick - PLA / inside
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Fantastic Brick: Another brick, another material...
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Fantastic Brick: Bio-based Lego test bricks and parts
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Laz75: Modulex Unreleased 2x4 Bricks
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Fabian BL: ??
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Fabian BL: Mystery bricks. (Not my pictures)
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Fabian BL: LEGO plastic injection 2x4 mould ca. 1995.
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Master Sagh: Special reds
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Brickbaron: Lego Yertle the Turtle
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Brick Colorstream: PC Minifigures (China)
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YoavTLV: Q elements
WRme2: Things you find out during breakfast...
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Fantastic Brick: Just found: Lego set with Bayer bricks...
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Laz75: LEGO DUPLO Prototypes
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friedi1959: Nachbau Lego Samsonite 717 Junior Constructor Set
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stuartwilcox9: image
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WRme2: System Plast, Kolding, Denmark - Test bricks
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stuartwilcox9: image
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stuartwilcox9: image
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stuartwilcox9: image
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stuartwilcox9: image
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O'Cleirigh: The World Of Lego Exhibition 1981
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WRme2: April 1950 - A contract between LEGO and "Geas" Kunstharts-industri
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Fantastic Brick: Lego Klodshans December 1993 (2)
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Fantastic Brick: Lego Bayer old logo
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BF Bricks: 2x4 Brick Duffel Bag
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YoavTLV: Visiting Maxx at Utrecht
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WRme2: Comparing Marbon/Borg-Warner Amsterdam test bricks
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WRme2: Test bricks found in the Netherlands