About
The Whistling Yo-yo is a tin novelty model in the Lumar range, stamped “THE ORIGINAL LUMAR WHISTLING YOYO REGISTERED MADE IN GT BRITAIN.” Holes or slots in the tin body create airflow that produces a whistle sound while the yo-yo spins — a feature that made it a deliberate specialty alongside the standard models in the Lumar catalogue. The registered design designation indicates Lumar held design protection for the mechanism. Fixed axle.
