Cal Farley 640.23x, 1970 Cal Farley Boy's Ranch Charity Seals Sheet, full gum, F, NH. Issued 1970 by Farley's Boy Ranch. Two alternating seals, with slogan, "32 Years of Helping Boy's", multicolored, seal size: 38x22mm, perf. 121/2. Sheet of 50 (5x10), SE3S, PM@B full color, firm paper, shipped flat.
Cal Farley Boy's Ranch Charity Seals are usually classified as Charity Seals or Cinderella Stamps.