Heptagonal star antiprism (3/7) a semi-regular solid, one of four prism models, made of coloured card by Mr R. Buckley, c.1973. Heptagonal star antiprism (3/7) a semi-regular solid 1973
Heptagonal antiprism (1/8) a semi-regular solid, one of four prism models, made of coloured card by Mr R. Buckley, c.1973. Heptagonal antiprism (1/8) a semi-regular solid 1973
