Although this wonderful poster looks quite old, I suspect is is a relatively recent mass market copy. In the original Fantomas has something in his hand–a knife, I think. There exists a book cover from the 40’s, same pose, in whiich he has a rose in his hand!
That hand on the left (his right) does look awkward and I did see another version (which was horizontal and he did have a knife in that hand). One poster might have been for the original book/magazine cover and one for the 1913 film. It was a popular French horror series over a 100 years ago.
It does look like something should be in his hand on the left (his right hand), seems an awkward pose. I did find one poster for the 1913 movie where he is holding a knife. But there was also a magazine or book the movie was based on so posters could be different for both. Popular French horror serial now over 100 years ago.
MATTHEW'S ISLAND 
Although this wonderful poster looks quite old, I suspect is is a relatively recent mass market copy. In the original Fantomas has something in his hand–a knife, I think. There exists a book cover from the 40’s, same pose, in whiich he has a rose in his hand!
That hand on the left (his right) does look awkward and I did see another version (which was horizontal and he did have a knife in that hand). One poster might have been for the original book/magazine cover and one for the 1913 film. It was a popular French horror series over a 100 years ago.
It does look like something should be in his hand on the left (his right hand), seems an awkward pose. I did find one poster for the 1913 movie where he is holding a knife. But there was also a magazine or book the movie was based on so posters could be different for both. Popular French horror serial now over 100 years ago.