I came across a in package 1960-1970 Duncan JO-JO special Chinese flying top. I’ve never heard of it and all I can find online is that most were destroyed and few exist. Does anyone know anything about this particular yo yo and if its collectable or rare. Thanks
All I could find was this wiki page: Duncan Jo-Jo Speed Ring | YoYo Wiki | Fandom
I think it’s probably the same one you found, but it’s interesting for anyone else to read.
Apparently it’s a mini diabolo, sort of a predecessor to 4a offstring.
I made that article on the Yo-yo wiki 
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Will thank you for providing me with something to work with.