A number of different units of measurement were used in Argentina as its national system was derived from Spanish Castillian.
The metric system was legally optional since 1863 and has been compulsory since 1887.
One milla was equal to 1.85 km (1.149 miles) [4] Different units were used to measure mass.
[4][5] The marco used for gold and silver was equal to 3544.4 grains.
Although theoretically the metric system was compulsory, a survey in 1920 revealed the widespread use of both traditional Spanish units and US customary units (particularly in trade with the US).