Lao weights and the Luang symbol

Abstract

This investigation reveals that a weight system reform in the middle of the fourteenth century in Laos introduced a basic mass unit of 1.23g, which was unchanged until the nineteenth century. For weighing small quantities of precious goods, two classes of compatible weights were in use – one pot-shaped and one geometric. While the shape of the former probably owes its origin to a Buddhist background, the design of the latter is more obscure, but the few facts point to an influence from the Roman/Byzantine Mediterranean world via the ancient port Oc Eo and the Khmer empire. Also examined is a snake symbol called luang, appearing on certain geometric weights and having a particular significance regarding Lao royalty and mythology.