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LEGO Set 402-1 Universal Building Set (1977 Universal Building Set > Basic Set) | Rebrickable - Build with LEGO
LEGO 400-1 Universal Building Set Set Parts Inventory and Instructions - LEGO Reference Guide
Technicopedia: Universal Sets
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BASIC Sets - LEGO 733 Universal Building Set 507 Piece Classic 1980
LEGO Set 40-1 Universal Building Set (1976 Universal Building Set > Basic Set) | Rebrickable - Build with LEGO
LEGO Universal Building Set | Brickset
