2 ½” x 4 ¼” Business Card with photograph of a double span Parker’s Patent Wrought-Iron Truss Bridge

2 ½” x 4 ¼” Business Card with photograph of a double span Parker’s Patent Wrought-Iron Truss Bridge (written beneath photo in handwriting is Holyoke Mass). On reverse is printed National Bridge & Iron Works, Blodgett & Curry, Proprietors, 15 State Street, Boston, Mass. Chas. H. Parker, Consulting Engineer. A. W. Parker, Supt. Of Works. Contractors for Building and Erecting Wrought-Iron Railway and Highway Bridges and Roof Trusses.