LEGO 4.5V Supplementary Set
Set #870 · 1977 · 22 pieces · Starter build

Set Details
- Set Number
- 870
- Name
- 4.5V Supplementary Set
- Theme
- Technic
- Year
- 1977
- Pieces
- 22
- Complexity
- Starter
- Build Time
- 10-20 minutes
- Ages
- 4+
- Type
- Play-focused
About LEGO 4.5V Supplementary Set
LEGO 4.5V Supplementary Set (set #870) is a small, compact build with 22 pieces from the Technic theme, released in 1977. The Technic line features mechanically complex models with gears, axles, and motors. This is a starter-level build suitable for ages 4+, with an estimated build time of 10-20 minutes. This set dates from the pre-minifigure era, before LEGO introduced its iconic yellow-faced figures in 1978.
Finding Instructions
Instructions for older sets like #870 (1977) may not always be available on LEGO.com. Try searching the set number directly, or upload a photo of the bricks to LegoFinder — the AI can identify vintage sets from their parts.
4.5V Supplementary Set FAQ
More Technic Sets
Also Released in 1977
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