A Knife The Joker would own Kershaw Boa Multicolored 1580MC. This knife came out around 2004 and discontinued 2009. it has an old supersteel! CPM440V (Now s60v) the video here is not multicolored and it sports s60v instead of cpm440v (cpm440v is better steel and more expensive) over the 5 years that this knife has been in production the steel changed 3 times
First: cpm440v (First release)
Second: s60v (Second release)
Third: s30v (Final release)

if you get your hands on any of these thay are collectible.

Link: Kershaw Boa Multicolored 1580MC
https://www.youtube.com/watch?v=iAeZxkSussg