I'm more interested in modern pens, but I have had a few obscure-to-me fountain pens, such as a Hardtmuth (Koh-I-Noor) with a fantastic soft stub (probably flex) Artus nib (Lamy took over Artus, I think, not sure). Hardtmuth and Artus were Czechoslovakian.

Also Czechoslovakian is a Centropen that I do have. A Polish friend who lives in the Czech Republic gave it to me a coupla years ago. It's a pretty pen, but it leaks, so I don't use it.