Parkerized emblem

Diameter 5 cm. Height 2.2 cm. Small crack on the wood. Parkerizing is a method of protecting iron from rust, through an electric phosphate treatment. The method was invented by Parker Rust Proof Co. founded by CW and WC Parker in 1941 and used extensively during World War II in the manufacture of weapons. The method was based on discoveries made by William Alexander Ross and Thomas Watts Coslett in 1907, which were refined throughout the 1910s and 1920s. The big difference between this earlier method and Parker's was that Parker had based his method on readily available materials, i.e. domestic materials, which proved practical when the Second World War broke out. This brick was most likely a company gift or an advertising item.