1926 Inscribed Sterling Silver Cigarette Case with Niello & Guilloche

• Sterling Silver - Sterling silver is a mixture of 92.5% pure silver and 7.5% of another metal, usually copper. Fine silver is 99.9% pure silver, and is relatively soft and the addition of the very small amount of copper gives the metal enough strength and hardness to be worked into jewellery, decorative and household objects.
• Guilloche - A form of classical decoration consisting of a repeating ornament of interlacing curved bands, sometimes forming circles, and further decorated with rosettes or other flower forms.
  
  The name is derived from the inventor, French engineer Guillot, who invented a mechanical method of inscribing fine repeating patterns on to metallic surfaces.
  
  On enamelled items with guilloche decoration, the surface is firstly engraved with the repeating pattern, and then covered with several layers of enamel, each of which is fired.
  
  Where the item has not been enamelled the form of decoration is usually called "engine turned".
• Niello - A compound made up of lead silver copper and sulphur that is black in colour, and applied to the engraved areas of silver items, thus highlighting the engraving by making the black niello detail stand out from the silver background. It was used on edged weapons from the Renaisance onwards, and also by Russian crafstmen of the19th century.

This item has been included into following indexes:

• smoking accessories, cigarettes - cigarette cases, silver 509