I just took delivery of a new Osmiroid 75 piston-fill calligraphy pen that I bought on eBay ($20). It comes with 6 gold nibs (Fine, Medium, B, B2, B3, B4) that are also usable on my Osmiroid 65 lever-fill pen and my old Esterbrook Dollar Pen. Both pens write like a dream — so much nicer than my 3 old Sheaffer calligraphy pens. I filled them with Noodlers Hunter Green and the Diamine orange that I use for grading.
I really enjoy both fountain pens and calligraphy. I am currently a month late in replying to a former student who sent me some pen-and-ink correspondence. Unfortunately, I won’t be able to do much calligraphy or letter-writing tonight. The only use the Diamine orange is going to see today is grading student papers.