Examine the following razor:
http://www.anwealde.com/razors/LouPoint.jpg
As you can see from my historically accurate composite sketch of what the razor probably looked like originally, the special notch comes very close to what Lou envisioned
http://www.anwealde.com/razors/LouPoint-revised.JPG
I fully expect this ebay auction to end in the hundreds if not thousands of dollars.