Hello, I am looking for info on this plane. I know that it is a Chaplin's Patent Block Plane. I dug through what books that I have, but could not find a Model Number. This has a fixed throat, with a corrugated top casting, and a smooth sole. Also has the cutout cap. Knob missing, everything else seems to be correct. Sole measures 1-29/32" x 6-1/2". Thanks, Lou