Sponsors and Curators The Museum of Yo-Yo History is a labor of love, and we would not be able to stay up-to-date with exhibits without the support of our sponsors and curators. Big thanks go to One Drop Design and Duncan for supplying us with their latest models, YoYoExpert for their help and support, and to Cody Orr, TotalArtist and YoYoBrothers™ for allowing us to use their collections! If you're a manufacturer, or just a big collector and you want to help support the Museum drop me at line at chimera@yoyomuseum.com Duncan Butterfly AL - Unknown Exhibit #4485 Type Special Release Shape Concave )-( Axle Bearing Finish Anodized Color Black/White Packaging Display Boxed Construction Multi-piece aluminum Response CBC Slim Pad Diameter 52.05mm Width 32.23mm Gap Fixed Gap Width 4.02mm Weight 62.04gm Condition Mint Date 2022 Owner Rick Brough Compare The Duncan Butterfly AL - UN(known) edition was a USA release availabe only at yoyoexpert.com and yoyosam.com. The Unknown edition was released Friday, April 8, 2022 at 18:00 MST. The edition was based on the Duncan Butterfly AL that first released at the World Yo-Yo Championship on August 18, 2019 in Cleveland, Ohio. Read more in-depth information about the history of the Butterfly AL. Recipe Diameter: 52.05mm Width: 32.23mm Gap width: 4.02mm Weight: 62.04 gm Bearing: Size C, full size with 10mm axle: Size C, half spec with 8mm axle Response: 19mm slim pads Material: 6061 aluminum Original retail price: $50 US Other Views Profile and internals Side A, angled, large Sides A and B, face, large Complete contents 2005-2024 Software © David W. Hall & Grahame BaptieWright Content by David W. Hall & Rick Brough