Large Vintage Metal Structo Livestock Trucking Semi Truck. This was made of a pressed steel material. The semi is approx 6 1/2" x 8 1/2" x 5 1/8" and it weighs 1.74lb. The trailer is approx 15 1/4" x 5 1/2" x 7 1/2" and it weighs 3.37lbs. Both have surface rust and markings along with some residue in the semi. Please see the images as they are part of the description. From the 1950s.