Sometime last year, I bought an old Esterbrook dollar pen – so called because they cost $1 back in the 1930’s and 40’s. It arrived in good cosmetic condition, but mechanically defunct. The nib would not stay on the section, and the ink sac had long since become dessicated and fragmented into a mess inside the barrel.
I ordered some replacement sacs from Pendemonium.com and used some shellac to attach one. But the nib problems were beyond my powers.
Today I discovered that the 7 nibs for my Osmiroid calligraphy pens are interchangeable with the Esterbrook’s. The result is a very nicely weighted, lever-fill calligraphy pen.