Stunning American Art Nouveau Silver-Encased Green Glass Vase, Alvin Corp

  
Superb American Art Nouveau (early 20thC) silver-encased green uranium glass vase by the Alvin Corporation (Irvington, New Jersey, USA) decorated in silver with beautiful flower patterns. Hallmarked with Alvin Corp stamp, 999/1000 silver (the highest purity level), registered pattern no. 19cm diameter x 17cm tall, weight 2.15kg. Good condition but crack on the base (but remains sturdy). In 1886 Alvin patented a process for depositing pure silver on metallic and non-metallic surfaces. In this process the article was first coated with silver and afterwards a part of the coating was cut away, thus exposing the base, as in pierced work.