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WRme2: Comparing Marbon/Borg-Warner Amsterdam test bricks
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WRme2: Test bricks found in the Netherlands
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HectorBart: 3001 Wrexham Test 'Z' Bricks
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Afol_Dastley: Rare Wrexham ( UK ) Factory Test 2x4 Bricks
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Fantastic Brick: Lego Borg-Warner Amsterdam test bricks - colors
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Master Sagh: Red tests and special oddities
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YoavTLV: Me and one of my best friends
WRme2: Legoland Sierksdorf bricks
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Master Sagh: Modern 3001 Collection
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Fabian BL: Trans-clear double logo without slots. (Norwegian brick)
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Fabian BL: I just had to share this... (Not my items)
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WRme2: Quick reference guide
WRme2: UK test bricks - Wrexham N and P
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Fantastic Brick: Lego Borg-Warner Amsterdam test bricks
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Fantastic Brick: Lego Borg-Warner Amsterdam test brick
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WRme2: Danish mystery bricks
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BF Bricks: Legoland California 2x4 brick bag
WRme2: Test bricks from 2xABCD mold F with LEGO logo (1)
WRme2: Test bricks from 2xABCD mold F with LEGO logo (3)
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Laz75: Dark (?) Green Modulex 2x4 Brick
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Laz75: Evolution of the 2x4 Brick
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BF Bricks: Legoland California 2x4 brick bag
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Laz75: LEGO Test Bricks for Sustainability
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Laz75: LEGO Test Bricks for Sustainability
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WRme2: C13 with empty stud - top view
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piros_kek: Bricks & Beer
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Fantastic Brick: Lego Borg Warner Amsterdam test brick
WRme2: Brick with tubes - K prototype / test mold
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Matth cornelis: As per special request... my previous posted trans marbled bricks from the underside ⬆️⬇️
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Fantastic Brick: Welcome to your new home, beauty!