[Boston ?]: (n. d.). Ca 1870s / 1880s. Two domed albumen images of stacked cannonballs in the Navy Yard. Photographer not identified. 3-7/16" x 6-15/16. Flat yellow mount, round corners, with printed yellow description slip affixed to verso. Hint of age-toning & soiling to card. Images clear & sharp. VG+. Item #49687
"The Charlestown Navy Yard, later the Boston Naval Shipyard, was one of the oldest shipbuilding facilities in the United States Navy. It was established in 1801 as part of the recent establishment of the new U.S. Department of the Navy in 1798. After 175 years of military service, it was decommissioned as a naval installation on 1 July 1974." [Wiki].