Vintage LEGO Lot Of Early Bricks Blocks Assorted Colors & Shapes 1960s/70s

Legos need cleaning, but otherwise good condition.

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Lot of 74 Vintage Large Lego Bricks Multi-Colors & Sizes – Touched

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Bricks on Display a collection of interlocking building bricks

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Vintage Lego Duplo Bricks & Blocks Lot of 72 Pieces Various Colors & Sizes

How durable are Lego bricks? I have a lot of sets not yet opened