The Oxy1 was the very first yo-yo (not mass produced) by Oxygene. It was a slimline aluminum yo-yo with rubber O-rings on the rims, in addition to a titanium axle with a ball bearing, an adjustable string gap and a starburst response system milled into the halves. It was handmade by founder Carlo Menon in 1997.
Oxy0[]
The Oxy0 was an earlier prototype also handmade by Carlo Menon. Physically, it is the same as the Oxy1, but there is one key difference; The Oxy0 did not have the milled starburst like its brother did.