Cars are tested at special track with various obstacles at Chicago Exhibition.
Full title reads: "TREAT 'EM ROUGH - Testing cars on special track at Chicago Exhibition."
Chicago, United States of America (USA).
Various shots of a car riding very fast across the special testing track with curves, bumps, sand and other obstacles - it looks like a cross country ride.
Note: Paperwork states that item with the same title and description is missing from the issue 34/50 (Dublin Special). It is possible that this is the same story used as Special in 34/50 and reused in 34/51.