The Manueline standard of the Brotherhood of St. Eloy (16 pieces) was calibrated in IPQ in 2004, and it was found that the mass of the complete set (4 arrobas, or 1 quintal) weighted 58.7547 kg.

The smallest weight, the escrópulo, would not have been part of the original set, as it is made of a different alloy and, although it’s shape should be different from the others, the two lightest pieces would have been, in accordance with the Manueline Ordinances, an half-octave. Therefore, it is presumed that this piece will have been added in a later phase, replacing another that may have been lost.