The main differences are the size and the spring configuration. In this version of the Climax the springs are compressed as opposed to expanded as they are in the previous blog posts regarding the Climax.
https://en.wikipedia.org/wiki/British_Standard_Whitworth).
And a link to the story of Joseph Whitworth.
https://en.wikipedia.org/wiki/Joseph_Whitworth
This was filled with weld and then reground.