There seems to be 3 yellow balls in the back cavity. I have not tested it. (Not working) I believe it is missing the battery cover. It measures the 29 long by 14 wide and is 11-1/2 tall.
Overall a very good vintage toy. The item "KING ZOR Dinosaur IDEAL TOYS With Original Dart Gun 8 Darts and 12 Balls 1960s" is in sale since Sunday, July 1, 2018. This item is in the category "Toys & Hobbies\Vintage & Antique Toys\Other Vintage & Antique Toys".
The seller is "steam455" and is located in Saint Paul, Minnesota. This item can be shipped to United States.