William B Kerr Co (1855-1927) is one of the most famous American companies, along with Unger Brothers, that developed their own unique jewelry designs and produced masterpieces of the Art Nouveau style.
Unfortunately, in 1927 the company went bankrupt, after which it was bought by Gorham Manufacturing Co.
I would like to note that many of the products of this company have reached us in a redesigned form. At the same time, the Kerr design cannot be confused with any company of the Art Nouveau era.
