LEGO M20-2315-100 Modulex Box - 100x Brick 1 x 1 x 5 with Vertical Grooves

Released 1963 · 100 pieces · Modulex

LEGO Modulex Box - 100x Brick 1 x 1 x 5 with Vertical Grooves (M20-2315-100) was released in 1963 as part of the Modulex theme, with 100 pieces. That makes it the 4th largest of the 35 Modulex sets in the catalog. It was one of 35 Modulex sets released that year (see them all). Released in 1963, 63 years ago, well past the two-to-three-year run most LEGO sets get, so it is almost certainly out of production.

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• Estimated value: $58 (modelled from piece count, era, and age, not live market data)

Availability: Likely retired (inferred from its release year, not an official retirement date)

Full details, the price breakdown, and the minifigures included are below. Add it to your collection to track what it's worth.

• The 4th largest of 35 Modulex sets
• 58¢ per piece, about typical for Modulex

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Set data from the Rebrickable database, refreshed daily. Catalog data as of 2026-09-01. Values are this site's estimates, see how they're calculated.

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