It's useful: you can even shave with it

[ryzellon.livejournal.com]

Ockham's (Straight) Razor.
It's a fully functional straight razor (believe me, it's sharp) with engraving on it. Unless you take proper safety precautions (like taping the sharp edge, etc) please don't hand engrave razors.

Addendum: It's not misspelt. I've not gotten the wrong information. There are, in fact, two common spellings of William's name. He is actually "William of Occam/Ockham" with the former variant the more common form and the latin spelling. I deliberately chose the other one because it came out much better in the calligraphic font.