A mahogany cased set of standard troy ounce weights made for the County of Gloucester by Doyle & Son of London, Dated 1890.
The velvet lined case contains 20 weights in total, ranging from 10 oz.tr, to .001 oz.tr.
Each weight is stamped with Royal ciphers for VR, GR and ER. With portcullis marks and indenture numbers.
Troy weight is a system of units of mass customarily used for precious metals and gemstones.