Opus 88 spare nib for the large fountain pens, size 12 (Opus) Size 6 Bock nib.
The nib fits the Opus Bela pens.
Enrich your Visconti pen with, for example your initials or another 2 letter combination which is meaningful for you. It is also possible to equip your pen with a semi precious stone in stead, available in various colors. The 2 letter combo or stone will be placed on cap, where the Visconti medallion sits.