VINTAGE SHEFFIELD STRAIGHT RAZOR

I've been pondering shaving with this, anyone know a technique I might use? Has shell and casing.... is it a projectile? :shrug:

http://cgi.ebay.com/VINTAGE-SHEFFIELD-STRAIGHT-RAZOR_W0QQitemZ110168563269QQihZ001QQcategoryZ3599 0QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

all i can say is WTF?

Its a pocket knife, not a straight! :roflmao

Gots to love eet :D