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Basic Building Set (503-1) is a Basic LEGO set released in 1987 with 39 pieces. Browse the parts list, minifigures, and verify loose bricks with our free scanner. Collectors browsing Basic sets use this inventory to verify loose parts, compare color variants, and read official build manuals without downloading PDFs. This set includes 19 unique part types.
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Parts in this set
19 parts · updating…
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Brick 1 x 23004 · ×4 · Red -
Brick 1 x 23004 · ×3 · Yellow -
Brick 1 x 23004 · ×3 · Blue -
Brick 1 x 43010 · ×2 · Yellow -
Brick 2 x 23003 · ×2 · Yellow -
Brick 2 x 23003 · ×1 · Blue -
Brick 2 x 23003 · ×2 · Red -
Brick 2 x 43001 · ×1 · Yellow -
Brick 2 x 43001 · ×1 · Blue -
Brick 2 x 43001 · ×1 · Red -
![Brick Special 2 x 2 [Red Wheels for Single Tyre]](https://cdn.rebrickable.com/media/parts/ldraw/0/3137c01.png)
Brick Special 2 x 2 [Red Wheels for Single Tyre]3137c01 · ×2 · Black -
Plate 2 x 23022 · ×1 · Red -
Plate 2 x 23022 · ×1 · Blue -
Plate 2 x 33021 · ×2 · Blue -
Plate 2 x 43020 · ×2 · Red -
Plate 2 x 83034 · ×3 · Red -
Slope 45° 2 x 23039 · ×2 · Yellow -
Slope 45° 2 x 23039 · ×2 · Trans-Clear -
Tyre 15 x 6 Offset Tread Small3641 · ×4 · Black