Oldest set I own - 550 Windmill (1975) : r/lego
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![BrickLink - Set 550-1 : LEGO Basic Building Set [Universal Building Set: Basic] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/SL/550-1.png "BrickLink - Set 550-1 : LEGO Basic Building Set [Universal Building Set: Basic] - BrickLink Reference Catalog")
BrickLink - Set 550-1 : LEGO Basic Building Set [Universal Building Set: Basic] - BrickLink Reference Catalog
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LEGO 550-1 Basic Building Set Set Parts Inventory and Instructions - LEGO Reference Guide
LEGO - Basic sets - 550 + 566 - - Basic building sets - Catawiki
Oldest set I own - 550 Windmill (1975) : r/lego
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LEGO 550-1 Basic Building Set Set Parts Inventory and Instructions - LEGO Reference Guide
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