Is the 1958 LEGO 215-2B brick rare?

Yes, this brick belongs to the 1958 Supplemental theme and is a sought-after vintage piece.

What is the set number for this blue brick?

The set number for this specific LEGO brick is 215-2B.

This 2x8 Blue Brick is part of the Supplemental theme.

Name: LEGO 2 x 8 Bricks, Blue (EUR/UK/AUS) (215-2B)
Brand: LEGO

Supplemental

Supplemental · 1958

Theme · SupplementalPieces · 6Set Number · 215-2BYear · 1958

Used

—

New / Sealed

—

Live on eBay now

JunkPal AI· resale insightanalyzing sold comps…

▍

Is the 1958 LEGO 215-2B brick rare?: Yes, this brick belongs to the 1958 Supplemental theme and is a sought-after vintage piece.
What is the set number for this blue brick?: The set number for this specific LEGO brick is 215-2B.
What theme does this brick belong to?: This 2x8 Blue Brick is part of the Supplemental theme.