How rare are the LEGO Technic Motor Bushings (Sp2-1)?

Being a 1977 piece from the Technic theme, these 4-piece set is considered a vintage and relatively rare item.

What is the set number for these bushings?

The set number for these specific LEGO Technic Motor Bushings is Sp2-1.

As vintage 1977 pieces, they are highly collectible and can be used for authentic Technic model restoration.

Name: LEGO Motor Bushings (Sp2-1)
Brand: LEGO

Technic

Technic · 1977

Theme · TechnicPieces · 4Set Number · Sp2-1Year · 1977

Used

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New / Sealed

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How rare are the LEGO Technic Motor Bushings (Sp2-1)?: Being a 1977 piece from the Technic theme, these 4-piece set is considered a vintage and relatively rare item.
What is the set number for these bushings?: The set number for these specific LEGO Technic Motor Bushings is Sp2-1.
Are these pieces still usable for Technic models?: As vintage 1977 pieces, they are highly collectible and can be used for authentic Technic model restoration.