Item 5779 - Shell casing manufacture, Portland Company, Portland, ca. 1917 Item 5779 - Shell casing manufacture, Portland Company, Portland, ca. 1917 Contributed by Maine Historical Society Item 5779 Zoom 4216px x 3184px - 14.1"w x 10.6"h @ 300dpi | Need a larger size? *Credit line must read: Collections of Maine Historical Society Image Info During World War I the Portland Company produced 108 mm shell casings for the artillery in use by the United States Army. Show Details