Groce & Wallace list a Charles F. Noble, engraver, working in Philadelphia 1850 and after, with Scattergood & Noble in 1859 and Noble & Nagle in 1860 and later. No mention of Noble & Benton, or Benton, however. No entries for Noble & Benton either in NYC directory of 1850-51 (New York has an Exchange Place). A James Noble, coiner, is listed in 1852 Philadelphia directory but not Noble & Benton. Sometimes it's helpful to know of an absence of information and that's what I have.

George C. Groce and David H. Wallace, The New-York Historical Society's Dictionary of Artists in America, 1564-1860 (New Haven, Yale University Press, 1957). It's a better source for American engravers and die sinkers than Forrer's eight-volume Biographical Dictionary of Medalists (or "BDM" for short). I looked there too, but nothing. Nada. Zip.