Model No. 223 FA: 42
Description: Surface of constant width which is not rotationally symmetric. (Meissner body)
RE: S 149 Nr.252; Fi Fotos 100, 101; M3 319,325,339,347 Jessen: Über konvexe Punktmengen konstanter Breite. Math. Zeitschrift B 29 Heft 2/3 Category: Helicoids
RU: E VI 13-25