How to identify the Japanese Showa period antique jewelry box

On some pieces, we can still find information on the origin, the Mint's proof of grade mark, and special U.S.-Japanese period markings, etc. The early Meiji period, the Imperial period, and the Imperial period are also marked. A significant number of early mid-Meiji items and Imperial Ceremonial Grants are completely unlabeled, with producer and material descriptions found at best on the original packaging.

Some goldsmiths, such as Nakagawa Jyoshi, Ichizurusai, etc., most of the works have only the author's name and mark, but not the material. The opposite is true of various stores and department stores, where many items carry only a material or purity marking, with other information written on the box or printed on the label and accompanying promotional materials.