
1) Scottish scales
Found on
https://www.crosswordclues.com/clue/trones
[Asturias] Trones is one of 54 parish councils in Cangas del Narcea, a municipality within the province and autonomous community of Asturias, in northern Spain. Its villages include: Araniegu, Faéu, Ḷḷourante, Olgu, Paraxas, Rozas and Trones. ...
Found on
http://en.wikipedia.org/wiki/Trones_(Asturias)

• (n.) A steelyard. • (n.) A form of weighing machine for heavy wares, consisting of two horizontal bars crossing each other, beaked at the extremities, and supported by a wooden pillar. It is now mostly disused.
Found on
http://thinkexist.com/dictionary/meaning/trones/

1. A steelyard. ... 2. A form of weighing machine for heavy wares, consisting of two horizontal bars crossing each other, beaked at the extremities, and supported by a wooden pillar. It is now mostly disused. Trone stone, a weight equivalent to nineteen and a half pounds. Trone weight, a weight formerly used in Scotland, in which a pound varied fro...
Found on
http://www.encyclo.co.uk/local/20973
No exact match found.