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“4.5V Supplementary Set” is LEGO® “Expert Builder” theme set number 870. Released in 1977, it has 22 pieces. With Re:GO you can automatically work out what percentage of this set you can build from the LEGO parts you already own, along with the missing parts and an estimated cost. Use the links below to compare prices on Amazon, Rakuten, Yahoo! Shopping, Mercari and Yahoo! Auctions, and find the best deal on new, used, or individual parts.
Part breakdown 14 types
Color split (most first)
Yellow×10
Light Gray×8
Black×3
White×1
Main parts (most used first)
3700 Technic Brick 1 x 2 [1 Pin Hole]
Yellow · ×4
3647 Technic Gear 8 Tooth
Light Gray · ×2
3701 Technic Brick 1 x 4 [3 Pin Holes]
Yellow · ×2
3705 Technic Axle 4
Black · ×2
3709 Technic Plate 2 x 4 [3 Holes]
Yellow · ×2
3738 Technic Plate 2 x 8 [7 Holes]
Yellow · ×2
141ac96 Wire with Light Gray 2-Prong Connectors, 4.5V, Type 1 Connectors, 96L
White · ×1
3648a Technic Gear 24 Tooth [Old Style - Three axle holes]
Light Gray · ×1
3650a Technic Gear 24 Tooth Crown with Flat Teeth
Light Gray · ×1
3713 Technic Bush
Light Gray · ×1
3736 Technic Steering Pulley Large
Light Gray · ×1
468c03 Battery Box, 4.5V 6 x 11 x 3 1/3 Type 3 [Complete Assembly]
Light Gray · ×1
6216a Motor, 4.5V Type 1 for 2-Prong Connectors without Middle Pin
Light Gray · ×1
70012 Rubber Band Medium (Square Cross Section) Thin Cut
Black · ×1
More “Expert Builder” theme sets
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