Fig. 3From: Analytical study of an 1899 Peruvian dinero: unveiling the mystery of a coin that wasn’t officially mintedComparative X-ray fluorescence spectra of the four coins depicted in Fig. 1. a silver coins, b 1899 dinero coin measured closer to the rim. The inset of the XRF spectra selected in b shows the presence of a very small silver peakBack to article page