Fig. 2

Metrological study of the 1899 dinero coin (black squares) in the context of other contemporary dinero coins from the 1863–1917 period. a Yearly mean diameter, b mean thickness, and c mean weight. Standard deviation is included when three or more coins from the same year were available. Red square is the highly worn 1875 dinero coin from Fig. 1b. Grey areas cover the years when no dinero coins were minted (according to official figures). The horizontal line in a indicates the official diameter. Horizontal lines in c are the maximum and minimum legally accepted weights