Allow me to add to gunguychris' post.
The first photo shows some Ruger Speed Sixes with half moon and full moon clips whilst the second photo shows the extractors on a S&W 547. Look closely to see the black parts on the star.
Ruger also made a Speed? Six for a European customer with an extractor similar to that of the Charter Arms. I read that the delay in introducing the Charter was due to a patent infringement on the Ruger design. I just read it and cannot verify the statement.