Amazon.com: Worlds Smallest Duncan Butterfly Yo-Yo : Toys & Games
Vintage Genuine Duncan Butterfly Yoyo and Fli Back Yoyo's - Etsy
Vintage 1970's Duncan Butterfly YoYo - Ruby Lane
Amazon.com: Attention: This Is An Assorted Item, Unless Otherwise Stated The Item Will Be Selected Randomly. - Duncan: Vintage Style Butterfly Yo-Yo - Assorted Colors : Toys & Games
Butterfly® Yo-Yo - Duncan Toys
Classic YoYo: Butterfly - Tiddlywinks Toys And Games