The Superior Labor - Leather Clip 2-Pen Holder - Dark Brown Shop By Brand it has the additional bonus

it has the additional bonus of easily interchangeable nibs

Diamine 150th Anniversary Fountain Pen Ink (40mL) - Burgundy Royale

70mL of high-quality fountain pen ink

Clairefontaine Age-Bag Tan Notebook A4 - Graph

Kaweco Liliput Ballpoint - Silver

The Superior Labor - Leather Clip 2-Pen Holder - Dark Brown Shop By Brand it has the additional bonusThe Superior Labor Leather Clip 2 Pen Holder Dark Brown Secure your favourite writing instruments to the cover of your notebook with this 2 pen clip holder. Beautifully and carefully stitched by hand in Japan, Superior Labor's pride in craftsmanship is clear. The leather is rich and strong, securely holding your writing instruments. The sturdy brass clip will ensure the holder stays snug and secure on your notebook, and through all of your stationery