A FOUNDER'S GRADE "TYPE 17" BODY AND FROG MECHANISM for a No. 4 smoothing plane by STANLEY. Fully 99% of the original black japan finish remains on this unused plane body. The frog adjustment screw to regulate the width of the throat, originally introduced in 1910, was eliminated for the sake of efficiency during World War II era production. As good as they get. Length = 9.00 Inches (Ref. Id No.: 415789) [Free Shipping]