E. R. Parker, Hardware Specialties Manufacturer and Dealer, Scranton, Pa.

"E. R. Parker, manufacturer and dealer in new hardware specialties, 227½ Wyoming Avenue, Scranton, Pa. Parker's Patent Combined Clamp and Filing Guide."

Handwritten in elaborate Spencerian script on the other side of this business card: "Presented by C. B. Winchell, Harrisburg, Pa."

The illustration of "Parker's Patent Combined Clamp and Filing Guide" refers to a patent for an "Improvement in Saw-Clamp and Filing-Guide" (see below) that was issued to Edwin R. Parker in 1879.

Improvement in Saw-Clamp and Filing-Guide. U.S. Patent No. 219,650, dated September 16, 1879.
"Be it known that I, Edwin R. Parker, of Scranton, in the county of Lackawanna and State of Pennsylvania, have invented a certain new and Improved Saw-Clamp and Filing-Guide . . . . The object in making this invention is to produce a convenient instrument or machine for clamping and holding the saw-teeth and guiding the file in filing all sizes of circular and mill saws of any gage, size, and shape of teeth, and whether the saw be on the arbor or removed therefrom; and the improvements consist, respectively, in the several devices, and in the combinations and sub-combinations, as hereinafter described and claimed."