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hankypanky7: Original (Dutch) neon sign from 1958 - Dutch orderno. 0214a
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vonboden: LEGO named beams Finland
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Fantastic Brick: Lego Bayer old logo - slightly marbled
WRme2: Stud logos found on Pat.Pend. 2x4 bricks without cross-support
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Fabian BL: LEGO 1:87 Opel Kapitän undercarriage variants.
WRme2: US test bricks - Mold B - error (1)
WRme2: US test bricks - Mold B - error (2)
WRme2: US test bricks - Mold B - error (3)
WRme2: US test bricks - Mold B
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Fabian BL: Norwegian 1950's LEGO text bricks with water decals.
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AzureBrick: LEGO Grangemouths F mould
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Fantastic Brick: Lego Bayer K-bricks / different bluish shades
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Brick Colorstream: Bakelite (Polyoxybenzylmethylenglycolanhydride)*
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Fantastic Brick: Lego US test bricks (13)
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Fantastic Brick: Lego test bricks 3/09 to 3/16
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AzureBrick: LEGO 1950s 'Watermelon Splat' Baseplate
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Fantastic Brick: Lego "undrilled" wheel holder prototype
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Fantastic Brick: "Confused" Lego BASF test brick
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Fantastic Brick: "Confused" Lego BASF test brick
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WRme2: Test bricks found in the Netherlands
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WRme2: Test bricks found in the United Kingdom
WRme2: Test bricks: Bayer - LEGO - BASF
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maxx3001: LEGO: Pearl gold test bricks
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maxx3001: LEGO: Sellers picture Dutch test bricks
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Fabian BL: LEGO Mursten. Early Norwegian box design.
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Fantastic Brick: Roman excursion (5)
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Fantastic Brick: Roman excursion (6)
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Fantastic Brick: Roman excursion (7)
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Fantastic Brick: Roman excursion (4)
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Fantastic Brick: Roman excursion (2)