The British 30mm AFV brass cartridge case, repurposed into a pen holder, is a unique piece of trench art from the military. Originally used in armored fighting vehicles (AFVs) for firing 30mm ammunition, this brass cartridge case was creatively cut down and transformed into a functional pen holder. Such trench art reflects the ingenuity and resourcefulness of soldiers or civilians during or after conflicts, turning remnants of war into everyday objects. Today, these items are prized by collectors for their historical significance, representing a fusion of wartime heritage and artistic creativity, and serving as poignant reminders of past conflicts