Fig. 4From: Analytical study of an 1899 Peruvian dinero: unveiling the mystery of a coin that wasn’t officially mintedComparative X-ray fluorescence spectra of the different objects described in Additional file 1: Tables S3, S4 made from similar alloys than the 1899 dinero coin (shown in the bottom). Full description of each object and corresponding photographs are in the supplementary information. CF counterfeitBack to article page