Kaweco Perkeo Fountain Pen - Old Chambray Medium Lamy Multi System Pens Tsuki-yo is a rich blue-black

Tsuki-yo is a rich blue-black ink with hints of teal and blue-green on drying

Length: 100mm

when the Manhattan Project team was there developing the nuclear bomb

This ink should only be mixed with other Baystate colors

Kaweco Perkeo Fountain Pen - Old Chambray Medium Lamy Multi System Pens Tsuki-yo is a rich blue-blackThe Perkeo is a stylish entry level fountain pen perfect for students and beginners. It carries on Kaweco's hallmark combination of classy and offbeat styling elements with its octagonal cap, 16 sided barrel, and funky two tone color schemes. Its triangular grip section makes it easy to hold at the best angle for smooth ink flow and effortless writing. The transparent threaded section where the grip meets the barrel acts as a hidden ink window,