Collectable 17.5cm x 12.5cm art card featuring Optical Illusions. Cigarette cards, Drapkin and Co. 1926. FROM TOP LEFT: Which is the taller traveller? Rotate the card clockwise and watch the wheels. Which way does the cogwheel go? The left hand plane is flying in a different direction from the two on the right, which are flying in the same direction as each other; now cover the plane on the right and what happens to the plane in the middle? Which of the fishing rod's handles connects? Postage available to any location in the world from trusted seller - selling successfully online since 2011. Please contact with any queries. All questions answered and offers considered.