What is the most expensive pen?

What is the name of this pen?

• I was at a Japanese store Kinokuniya the other day and I saw this amazing pen that had a pen ink and pda pointer in one, and it changed ink depending on which side you had towards you. You press the same clicker and the pen ink or pda pointer will come out differently each time if you have that side pointing towards you! I was in a hurry so forgot to take down the name of this pen does anyone know what it's called?

• Answer:

  Sanshoku boru-pen?　http://www.google.com/search?hl=en&client=safari&rls=en&q=%E4%B8%89%E8%89%B2%E3%83%9C%E3%83%BC%E3%83%AB%E3%83%9A%E3%83%B3&bav=on.2,or.r_gc.r_pw.&biw=1060&bih=690&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi