Most 3D-printed carriages in a model train

According to Official Guinness Records,

The most 3D-printed carriages in a model train is 55, and was achieved by FabLab, in collaboration with Switzerland Innovation Park Biel/Bienne and Felix Kunz (all Switzerland) in Biel/Bienne, Switzerland, on 22 September 2017.The record attempt was organised to celebrate the grand opening of the FabLab fabrication laboratory in the city.

For a complete list of 2017 records, please visit 2017 Guinness Records in Switzerland.

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Other Switzerland records that might interest you:

• Longest marble run
• Longest Tibet-style footbridge
• Largest functioning plane
• Fastest speed downhill skiing backwards (male)
• Longest journey by electric vehicle (non-solar)