In the Netherlands and Surinam , 20th century¹, a unit of mass = 500 grams. In the Netherlands, the apothecaries' pond = 375 grams.
In the 18th century, the pond was 492.16772 grams, while the Amsterdam pond was 494.09032 grams.
1. United Nations, 1966. Technical Conversion Factors…, 1972, page 310.
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Last revised: 9 October 2010.