Putnam Nail Co., Boston, Mass.
"The Putnam Nail Company building is a three-story, red brick structure sited in Port Norfolk, a small peninsula located between the Neponset River and Pine Neck Creek in Boston’s Dorchester neighborhood. ... Putnam Nail Company’s manufacturing complex, where they produced world-class horseshoe nails advertised as the only hot-forged and hammer-pointed horseshoe nails in the world..." longleaflumber.com