Grangemouth Lego boutiques Factory Test-Moule Brique Marbrée. Rare et unique des années 70

Product Name: Grangemouth Lego boutiques Factory Test-Moule Brique Marbrée. Rare et unique des années 70
LEGO Theme：Building Brick LEGO boutiques Set Number：3001 Brick Number of Pieces：1 Material：Plastic Year Manufactured：1970 Age Level：4+ Colour：Multicoloured Brand：LEGO Type：Brick LEGO Set Name：Grangemouth Lego Bricks Features：unique Country/Region of Manufacture：United Kingdom LEGO Subtheme：Unique brick
Very rare, unique and cool Lego history here.4 x 2 Lego brick, in a unique marbling pattern, green color with marbling hints of blue.Official Lego plates were used to throw test-molds in the labs, often using plastic pellets of many different colours, hence the unique, marbled colouring of the marbling of the “Grangemouth” bricks. These were never sold, only taken home by employees in the 1970s."Pat pend F1" is stamped on the underside of the brick. The brick is in overall very good condition, has some minor signs of use wear.Please inspect the pictures carefully, the item pictured is the one you will receive..