F.W. & R. King 1852 Trade card for F.W. & R. King, (successors to James Green,) Manufacturers of Mathematical, Philosophical, Optical, Surveying, and Daguerreotype Instruments, No. 33 South Street, Baltimore."
Trade card Ebay F.W. & R. King (33 South Street, Baltimore)
The date is based on a newspaper advertisement with similar text - Baltimore Sun, 2 Apr 1852.
