SF Spiral Zone Series

Special Force Group Spiral Zone (SF Spiral Zone) is a Bandai line of 1:12 scale, six-inch figures sold in Japan from 1985 to 1988. Its twelve items, numbered as “Acts”, comprised three figures (Bull Solid, Hyper Boxer and Sentinel Bear), four cloth uniform and armour sets, two equipment backpacks, two bare human figures and the Monoseed vehicle; a planned fourth figure, Fireball, was cancelled. Tonka licensed the concept from Bandai for its own seven-inch Spiral Zone line in 1986, and the 1987 American cartoon was partly based on the Bandai line.