Oxidized. The impresse decoration is blackened with a solution of sulphuret of potash and the flat areas are polished to a matt finish with pumice.
Nickel-Silver.
Britannia-metal, a tin and antimony alloy
Normal thickness of gilding or silver-plating, i.e. one gram of deposited silver spread over an area of one square decimetre.
Three-digit figure below the mark on cookware, indicating the last three digits of the internal process assignment.
The so-called 'bee-hive' mark was introduced on the 1st July 1909 at the express wish of the French customs authorities: all WMF articles, even the smallest, were required to bear this impressed mark.