A penbox is a container for calligraphic supplies. In Society heraldry, it’s drawn in a highly abstract manner, as found in Middle Eastern armory of the 14th Century and later [Mayer 45]; it is usually blazoned a “Saracenic” or “Arabic” penbox for that reason. As a charge from outside Europe, the Arabic penbox carries a step from period practice. For related charges, see penner and inkhorn.
Sayf al-Qamar Tarik ibn Abdul bears: Sable, a fess between a scimitar fesswise inverted and an Arabic penbox fesswise argent.
Tahira of Carolingia bears: Sable, on a fess argent an Arabic penbox azure.