How rare are the LEGO Two Lunar Landing Plates (306-1)?

As a 1979 piece from the Supplemental theme, these 2 pieces are considered a rare find for collectors.

What is the original theme of this set?

The set number 306-1 belongs to the Supplemental theme.

This item consists of exactly 2 pieces.

Name: LEGO Two Lunar Landing Plates (306-1)
Brand: LEGO

Supplemental

Supplemental · 1979

Theme · SupplementalPieces · 2Set Number · 306-1Year · 1979

Used

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New / Sealed

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How rare are the LEGO Two Lunar Landing Plates (306-1)?: As a 1979 piece from the Supplemental theme, these 2 pieces are considered a rare find for collectors.
What is the original theme of this set?: The set number 306-1 belongs to the Supplemental theme.
How many pieces are in this item?: This item consists of exactly 2 pieces.