From Joe :
I believe Mr. Porter has it right. The blades were made by Schilling forge
http://www.schillingforge.com/ . They only made the raw forging though and that blade has a lot of machine work done to it. It could be a sample sent back to Schilling, showing the almost finished product.
Hope this helps.
Joe Houser
Director of Customer Relations
Buck Collectors Club Liaison
Company Historian