| P.F. Weil Back label for "Interior view of the Thirty-seventh Annual Exhibition of the American Institute, 1867 …" 1867 Stereoview, back Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-ppmsca-08031 (digital file from original print, front) LC-DIG-ppmsca-08032 (digital file from original print, back) LL/110949
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