TWSBI are almost at the same level as Lamy when it comes to special and limited editions, but normally this is just within their existing range, however early March 2019 they leaked images of a new pen on their Instagram feed. A new pen, based on the 580, but with a different shape and size. Under a week later is was available on the TWSBI’s own store (and only there), to be sold out within no time at all. No further batches were released.