Product code: Vintage Color Cubes - America’s Best Known Design outlets Set
This is a different manufacturer but these look like the blocks from the Vintage Wechsler Bellevue BLOCK DESIGN Intelligence Scale outlets Test Form I which is no longer used in practice.
This is a different manufacturer but these look like the blocks from the Vintage Wechsler Bellevue BLOCK DESIGN Intelligence Scale outlets Test Form I which is no longer used in practice.