Standard International converter from Schmidt. Model K5
"Standard International" cartridges and converters are commonly used in most fountain pens.
A fountain pen converter is a cartridge-shaped reservoir. Most modern fountain pens use a cartridge/converter filling system (c/c for short) that allows the writer to use bottled pen ink.
This converter is compatible with the below brands;
Benu, Bexley, Caran d'Ache, Conklin, Edison, Esterbrook, Gioia, Faber-Castell, Franklin-Christoph, Graf von Faber-Castell, Kaweco (big sizes only), Laban, Leonardo Officina Italiana, LOCLEN, Montegrappa, Monteverde, Pelikan, Pineider, Porsche Design, Retro 1951, rOtring, S.T. Dupont, Taccia, TWSBI, Visconti, Waterford, Waterman, Ystudio
Also available in screwed K6 model here (Which is commonly used in custom pens)
