It all depended on a ball joint It was an applauded innovation in the dream world of soft toys when Franz Steiff invented a magical head mechanism which gifted his animals life-like moevement. The head was joined to the trunk by a tube (neck) & fastened to a revolving joint. On 24th May 1908, Steiff registered its innovation ball joint as a patent under patent number 208 992. & this very valuable replica of a polar bear on wheels dating from 1910 also boasts the special mechanism. Turning the bear's head triggers his deep growler voice. Equipped with glass eyes & metal rods, this polar bear on six-spoke wheels continues a long Steiff tradition, as animals on wheels were shown in its very first illustrated catalogue in 1892. They were extremely popular as pull-along animals or animals to ride on. jointed head, surface washable, limited edition of 1, 000 pieces world-wide, stuffed with wood shavings, with glass eyes & growler, with gold-plated "" Button in Ear"" 43cm