7502-23 CHALLENGE patent 9" smoothing plane. The Challenge Plane was patented by Arthur Goldsborough and manufactured by Tower & Lyon. This is the 9" smoothing plane version that doesn't have the word "Challenge" cast into the yoke like the jack plane version; both are rare but the 9" model is the rarer of the two. Two braised repairs but otherwise clean and intact. Japanning 50%. Good (HUH1611) 400-800