Antique English Britannia Metal Tea Pot. Philip Asberry & Sons

The Britannia Metal teapot with spout and hinged domed lid with finial and nice scrolled handle. Marked on the outside bottom with:
        Non Conducting Handle
    TRADE BRITANNIA MARK
Philip Asberry & Sons SHEFFIED
529 P               Expansion Bottom

England - Sheffield
Third quarter 19th century.
Period: Mid Victorian

Height: 19,8 cm. (7,8 inches.)
Length.: 25 cm.  (9,8 inches.)    
Weight: 763 grams.      

Britannia Metal is is a specific type of Pewter Alloy, favoured for its silvery appearance and smooth surface. The composition by weight is typically about 92% Tin 6% Antimony and 2% Copper.