As I was prowling the ebays for fountain pens, I came across a lot of 5 Koh-I-Noor Rapidograph Technical Fountain Pens. 4 of the pens (marked with a grey band and a 0 on the box) are unopened with a fifth pen marked 00 with a yellow band on the box.
I have a general grasp on technical pens, but have no idea about these.
What inks would I use (if I were to purchase them), are they so valuable that I would not want to open the 4 unopened boxes?
Any information would be a great help.
If pictures are needed, here is the ebay link= http://www.ebay.com/...984.m1423.l2649
Hopefully there will not be a sudden bidding war erupting against me after others see this :-)!
Edited by Tadeusz, 24 August 2013 - 15:59.