I'm using this extrafine tool during the last weeks. Rotring Isograph keeps the best old style in technical pens. Not only the pen itself, also the box, ink bottle, etc show great quality.
When I was studying engineering there were many shops near university dedicated to these technical tools. A kind of heaven shops full of expensive and quality items. I visited them recently in order to find this Rotring and unfortunately either they are gone or they don't have a wide selection of pens. Sad, sad.
Very happy with this 0,18 needle point and wanting to try 0,10.
Btw, did you know Rotring means Red-Ring (Rot-Ring)? Long live to Rotring.