What is the difference between mannenhitsu and pen?

Question

I was studying on another website and ran across a blurb that said that a pen is also called mannenhitsu in Japan. Is there a difference between the two? If not, is mannenhitsu said sometimes, just as often, or more often as pen in Japanese?

Answer 1

万年筆（まんねんひつ） specifically refers to fountain pens, whereas ペン is more generic and can also refer to other types of pens, such as ballpoint pens.