In full tula metal: Niello made at Tula in Russia. Also attrib., as tula-work.
1839. Ure, Dict. Arts, 1259. Tula Metal, is an alloy of silver, copper, and lead.
1884. Knight, Dict. Mech., Suppl., Tula, the Russian niello silver.
1891. Cent. Dict., Tula-work.
