remarkable all original and highly sought after 19th century high victorian era ornamental cast bronze residential doorknob surface mount escutcheon or backplare designed and executed by the metallic compression casting company, boston, mass. the intricately designed backplate contains a nicely aged surface patina with a black enameled inlay used to accentuate the casting detail. the backplate features a single keyhole, well-designed thimble or collar and three holes for monting purposes. the elaborately designed escutcheon dates to 1869-1871. the metallic compression casting company manufactured "house trimmings," such as knobs, hinges, escutcheons, bell pulls, along with dies for printing wall paper, and for bookbinders. the highly successful inventions of charles and michael smith during the 1860's, were used extensively at their foundry in bomerville, near boston, mass. the two founders (j.j. c. smith, president and jesse a. locke, treasurer) revolutionized metallurgic art, so far as fine casting is concerned. by employing the patented process developed by smith and mason, metal was taken from the mold, not with a rough surface, as in all the earlier known modes of casting, but as smooth and perfectly finished as a coin or medal struck by a die. very little is actually known or documented about this short-lived company. catalogs containing product and the like have yet to be found. the hardware giant russell & erwin company quickly recognized this market and soon after became sole agents for their hardware. numerous design patents were secured by both the metallic compression casting company and russell & erwin in 1870. some of the most sought after doorknobs (e.g., "lion" and "dog") were designed and patented by ludwig kreuzinger for the metal compression casting and/or russell erwin mfg. nearly all of the patented designs quickly appeared in russell & erwin's builders' hardware catalogs soon after. by 1872 the struggling metallic compression casting company filed for bankruptcy (district courts of the united stated, massachusetts district) and russell & erwin absorbed the company, including their foundry located outside of boston. the short-lived metallic compression casting company was dissolved going forward.