I just managed to pick up my first head/round knife, after a long search through many antique shops (I couldn't afford a new one). I picked up this nice Osborne for just $35, the blade measures exactly 4.0 inches wide, the knife overall is exactly 6.0 inches long. The blade is marked "C.S. Osborne & Co." in a circle, and the inside of the circle is marked "Newark". There is also a deep cross stamping above it. I know what head knives are for, what I am interested in is the history of this on