The Joker sculpt looks like it is based on this picture that was the original inspiration for the Joker.
Bill Finger, the ghost writer co-creator of Batman, brought credited Batman creator Bob Kane a photograph of actor Conrad Veidt wearing make-up for the silent film The Man Who Laughs (1928), and from this photograph the Joker was modeled. This influence was referenced in the graphic novel Batman: The Man Who Laughs, a retelling of the first Joker story from 1940.
The credit for creation of the Joker is disputed. Kane responded in a 1994 interview to claims that Jerry Robinson created the concept of the character:
“ Bill Finger and I created the Joker. Bill was the writer. Jerry Robinson came to me with a playing card of the Joker. That's the way I sum it up. [The Joker] looks like Conrad Veidt — you know, the actor in The Man Who Laughs, [the 1928 movie based on the novel] by Victor Hugo. [...] Bill Finger had a book with a photograph of Conrad Veidt and showed it to me and said, 'Here's the Joker'. Jerry Robinson had absolutely nothing to do with it, but he'll always say he created it till he dies. He brought in a playing card, which we used for a couple of issues for him [the Joker] to use as his playing card".
Bill Finger, the ghost writer co-creator of Batman, brought credited Batman creator Bob Kane a photograph of actor Conrad Veidt wearing make-up for the silent film The Man Who Laughs (1928), and from this photograph the Joker was modeled. This influence was referenced in the graphic novel Batman: The Man Who Laughs, a retelling of the first Joker story from 1940.
The credit for creation of the Joker is disputed. Kane responded in a 1994 interview to claims that Jerry Robinson created the concept of the character:
“ Bill Finger and I created the Joker. Bill was the writer. Jerry Robinson came to me with a playing card of the Joker. That's the way I sum it up. [The Joker] looks like Conrad Veidt — you know, the actor in The Man Who Laughs, [the 1928 movie based on the novel] by Victor Hugo. [...] Bill Finger had a book with a photograph of Conrad Veidt and showed it to me and said, 'Here's the Joker'. Jerry Robinson had absolutely nothing to do with it, but he'll always say he created it till he dies. He brought in a playing card, which we used for a couple of issues for him [the Joker] to use as his playing card".