Noodler's Baystate Blue Fountain Pen Ink with Free Pen Color__Wintergreen__itoya-profolio-oasis-lined-notebook-wintergreen-a5 they are not compatible with

they are not compatible with Leonardo fountain pens manufactured prior to 2021

Filling System: Visconti Rollerball A40 Refill

Robert Oster Signature L

15mm graphite lead

Noodler's Baystate Blue Fountain Pen Ink with Free Pen Color__Wintergreen__itoya-profolio-oasis-lined-notebook-wintergreen-a5 they are not compatible withThe reintroduction of a rare (and as of recently unavailable) mid 1940s family of inks that was once very popular in the New England area has been well received by enough pen users to warrant the expansion of these inks. Despite the highly unusual nature of this ink family (particularly when Baystate Blue is compared to far weaker nondurable modern inks) many Noodler's customers have requested that it be expanded beyond Baystate Blue. The following