It is a Sears unit, model 512.88016, with 24 inch diameter tires.
The seat at its lowest position is 24 inches above the center of
the wheel, and is adjustable upward for several inches. The seat
is red metallic. The unicycle looks like it is in good, but not
new, condition. Any information would be appreciated.
Please e-mail me at: "h.r.hofmann@lucent.com".