I dropped a pen cap on my concrete floor it bounced up 3 feet and i caught it. Pen cartridge holder and nib section are made from black ebonite.
10mm threads for cartridge holder and nib section. The thread for the jowo nib is 7.4mm. 12 mm triple lead threads on cap and body.Total capped length of pen is 5 11/16 inches. 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 rollerball cartridge only. I have never seen this combination offered.Length capped 144.4 mm 5 11/16 in. Length uncapped (from nib point) 136.5 mm 5 1/4 in. Cap width (widest point) 13.7mm. Barrel width (widest point) 13.4 mm.
Nib section pinch width 9.5 mm. Nib section length (to threads) 28 mm 1 1/8 in. Cap thread - triple start 12 mm.
This item is made of black ebonite, ebonite, rollerball pen, nikko ebonite, beige and black, mottled ebonite, yellow and black, red and black and orange and black.