Da FountainPen.
The Wirt company was founded in Bloomsburg, Pennsylvania by Paul E. Wirt around 1884 as a family business, even if the founder, a lawyer by profession, became involved in the production of fountain pens since 1880, obtaining his first patent in 1882.[1]
- ↑ we don't have the patent number but here is cited the date October, 11 1882.