Is the LEGO 5120-1 still in high demand by Technic collectors?

Yes, as a rare 1993 Technic component, the Polarity Switch (5120-1) holds value for specialized collectors.

How many pieces are in the LEGO Polarity Switch set 5120-1?

The set 5120-1 contains only 2 pieces.

This specific part belongs to the Technic theme.

Name: LEGO Polarity Switch (5120-1)
Brand: LEGO

Technic

Technic · 1993

Theme · TechnicPieces · 2Set Number · 5120-1Year · 1993

Used

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New / Sealed

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Converted from USD at the ECB reference rate — sold comps are US-market sales.

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Is the LEGO 5120-1 still in high demand by Technic collectors?: Yes, as a rare 1993 Technic component, the Polarity Switch (5120-1) holds value for specialized collectors.
How many pieces are in the LEGO Polarity Switch set 5120-1?: The set 5120-1 contains only 2 pieces.
What theme does the LEGO Polarity Switch belong to?: This specific part belongs to the Technic theme.