This advertisement was published in "Boyd's Business Directory of Over One Hundred Cities and Villages in New York State," published in 1870. The proprietors were C.A. STOCK and Theodore HAVEMANN.
The hardware store of Stock & Havemann guaranteed to have "Constantly on hand a full assortment of Tools for all Mechanics & Hardware Generally."
"Boyd's business directory" is available (and searchable!) online at Cornell University's Making of America site. It provides "access to 267 monograph volumes and over 100,000 journal articles with 19th century imprints;" the scanned material is fully indexed, and can be searched and/or browsed. (Genealogists will find much to appreciate, including official Civil War records of the armies and navies of the Union and the Confederacy.)