Here in Japan it costs 840yen (~10USD). It is a sketch pen but I use it for general writing purposes. I bought these at Tokyu Hands!
The predominantly black pen is the Linemarker A.T. The brown pen is an unused Tachikawa Student-G.
The body of the Tachikawa is not hard plastic (ie Sailor Clear Candy), so it shouldn't crack as easily as other pens. The body seems to be more softer.
The Linemarker A.T comes in three nib sizes. 0.1mm, 0.3mm and 0.5mm. I have the 0.1mm and the 0.3mm only.
Left one is the 0.3mm, right one is the 0.1mm nib.
These nibs are nails. Very short, very stiff no feedback, though they are both smooth.
I have other steel nibs (drawing nibs) from Tachikawa and I don't think you can put them on the Linemarker. Still need to dip them.
I have not tried removing the nib units but upon closer examination the nib unit of the Linemarker is similar to the School-G.
Shown below is the nib unit and section of the School-G pen. It is transparent :-) Section screws in the body. The Linemarker section has striations which feel comfortable to me.
There is a wick coming from the end of the section (where the cartridge is inserted). This wick snakes down to the edge of the nib.
The cartridge of the Linemarker A.T is proprietary. Tachikawa sells a 6-pack refill.
The leftmost cartridge is from the Linemarker A.T. When you buy the pen you get two of this refills inside the body.
The second cartridge is from the Student-G. The last cartridge is a J. Herbin international standard cartridge.
I originally mentioned that the pen can be used as an ED, I take that back :-(
The section of the pens has a weird threading pattern which ultimately allows ink to seep through the gaps! I think even with silicone grease using the Linemarker as an ED will be cumbersome.
You can use as an ED but it is just too troublesome for me. The thread pattern I mentioned above means that it will eventually leak specially if you forget to apply some silicone grease. Also if you over tighten the section on the body, the threads skip and you end up with a loose section. Do this often and the thread ends up getting damaged and we won't be able to properly tighten the section on the body. :-( Sigh
Here were the first lines written by both pens. The pen used should be easily noticeable in the sample below. The paper is Rollbahn section (5mm) in B6 size. The photo doesn't show it correctly but the paper is cream colored.
The pen is comfortable to hold, though please note that I have small hands! Even though it doesn't have enough heft the long slender body offers good balance even when full of ink. As I mentioned earlier, nib is smooth enough for me. Draws a consistent line because of the nails in its business end. Only time can tell if will develop a leak. Cheap and you only have 3 nib choices. You can get it in your favorite color ... black :-)
I use these nib sizes when addressing envelopes to be posted in the mail. My Japan address is very long so I need a really fine writing pen. I have other F sized pens but I've liked using these.
Hope you find this useful.
Edited by sessyargc, 05 December 2011 - 11:05.