Sold by Toys & International Games, patented by P. A. Roberts, 1985.
(plastic, 2.6 inches)
Varikon Box 3x3x3,
but here the 19 cubes are held in place by the edges of the central cross,
and you use the puzzle by simply pushing the cubes around.
Each cube is colored blue on three sides adjacent to one corner and red on three sides adjacent to the opposite corner.
The puzzle is to go between all red and all blue on the outside. Here is what the box back says:
from: www.uspto.gov - patent no. 4,511,144