Public domain
Aluminum casting. In this large Midwest factory converted to production of war essentials two workmen are pictured boring holes in the base of 37-millimeter armour piercing shot where primers will be inserted. Aluminum Industries Inc., Cincinnati, Ohio
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAluminum casting. In this large Midwest factory converted to production of war essentials two workmen are pictured boring holes in the base of 37-millimeter armour piercing shot where primers will be . 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.