This is Mego's 8" Joker. He was first released in 1974. It was great to finally be getting some villains to battle our 8" heroes. Batman was getting a bit tired of hauling in Action Jackson only to find that it wasn't a crime to wear a blue jumpsuit and sideburns.
In recent times, the character of the Joker has been subjected to a bit of interpretation. However, from the character's inception in 1940 all the way up to roughly 1989 when the first Batman motion picture was released, the Clown Prince of Crime had been largely unchanged. Just about every incarnation or depiction of him was fairly consistent. Since then, his look and back story have been evolving somewhat. Jack Nicholson's Joker in the first Batman film looked a bit different than what people typically expected. And of course, 2008's The Dark Knight changed the look and the demeanor of the Joker fairly radically.
Mego's Joker was produced when the Joker's look was still consistent with his original depiction. His head sculpt and costume reflect the look of the Joker from comics and cartoons of the time quite well. He looks like a very happy fellow...a happy fellow that has just tainted Gotham City's entire water supply with gallons and gallons Smilex toxin. He's funny that way.
Mego, instead of producing many layers of clothing, dressed Joker in an overcoat and screen printed body suit that resembled layers of clothing and a tie underneath. I've always thought this was a bit cheap and brilliant at the same time.
A complete Joker includes his overcoat, bodysuit, and pair of brown shoes. Also, take note that Joker's hands should be molded in white plastic to resemble gloves.