1950’s Esterbrook J “Double Jewel” Fountain Pen. Found in a $1.99 bag of miscellaneous office supplies at Goodwill last year.
little tendrills of ink started coming out of it pretty quickly
and soon, a pool of ink was gathering at the bottom of the glass. It was at this point I decided to try to write with it. The bladder lever doesn’t move much, and I didn’t want to force it. More soaking may help.