Terrific Pen Peter,
A Real Standout Coloured Circuit Board Blank,
Ideally Matched to the Gold and is that a Ti Finish on the Nose Cone and End Cap?
Beautifully Turned, and Finished.
Congratulations,
Brian.
I don't know who would be interested in such a random bit of trivia, but you can get purple PCBs (printed circuit boards) from a fabricator called Oshpark. They are known for their purple PCBs. They are great for hobbyist circuit designers, and I've had them fabricated circuits on a number of occasions when I used to make my own guitar pedals.