Thank you all for the kind comments. I appreciate them.

I forgot to mention the details in the original post, and I know some folk like to know so:
Material: Spalted (stabilised) maple and cellulose acetate
Cap Threads: 13x0.8 triple lead
Section threads: 10x0.75
Length open: 134mm
Length closed: 140mm
Diameter: 15.3mm
This pen doesn’t post.

Cheers
Ash