A bit of a ''Histerical Rollick".

Or, if you prefer, "A historical Relic".
When Ah waz a lad ... There was a bloke, lived "just up the backs" from us, who spent a portion of his time in Nigeria. He usually returned with an assortment of paraphernalia gathered while he was out there.
This is such an item, given under the title of "Black man's Pistol".
Supposedly from the Hausa tribe. I never doubted it, but decided, tonight, to look it up.
If you can stand a 3 min lecture here it is, (Broken link) little changed in the last 60 or so years, except that this one has NEVER been "razor-sharp". In fact, if you'll pardon the lapse "You could ride bare-arsed to London on it". Still a nice trophy/ memento for all that.