LEGO Electronic Control Unit (Forward/Backward - Stop)
Set #139 · 1969 · 9 pieces · Starter build

Set Details
- Set Number
- 139
- Name
- Electronic Control Unit (Forward/Backward - Stop)
- Theme
- Train
- Year
- 1969
- Pieces
- 9
- Complexity
- Starter
- Build Time
- 10-20 minutes
- Ages
- 4+
- Type
- Play-focused
About LEGO Electronic Control Unit (Forward/Backward - Stop)
LEGO Electronic Control Unit (Forward/Backward - Stop) (set #139) is a small, compact build with 9 pieces from the Train theme, released in 1969. The Train line features motorized and static train sets with tracks and stations. This is a starter-level build suitable for ages 4+, with an estimated build time of 10-20 minutes. This set dates from the 1960s, when LEGO established its universal brick system and opened the first Legoland park.
Finding Instructions
Instructions for older sets like #139 (1969) 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.
Electronic Control Unit (Forward/Backward - Stop) FAQ
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Also Released in 1969
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