This is a custom made fountain / rollerball pen. This pen is made of black and white ebony. It is a very hard wood. It comes from southeast asia and is very hard to find. Finished with lacquer and renaissance wax.
I used ebonite inserts for the threads. Also i made the nib holder and pen cartridge holder of ebonite. Ebonite is the best for threading. Ebonite is a hard vulcanized rubber material. It takes threads very well.
Seems to be very durable. 10mm threads for cartridge holders. The thread for the jowo nib is 7.4mm.
12 mm triple lead threads on cap and body. Total length of pen is 5 3/4 inches. Cap length is 2 3/4 and cap diameter is. 570 or just over 9/16 inches.
510 or just over 1/2 inch. This pen uses a jowo #6 nib. This pen also uses a rollerball cartridge.
The spring goes in end of pen body. It comes with a beaufort ink cartridge.
Also a k5 ink converter and ink cartridge. The cap has a shallow recess to go over the pen body. This gives it a nice finished look. I wanted to make a pen to give both options.
A spring drops in the bottom of the pen body and puts pressure on the rollerball cartridge. The spring is used for the pen cartridge only. I have never seen this combination offered. This item is made of black ebonite, ebonite, rollerball pen, nikko ebonite, wood pen and ebony.