They are but they were in Russia at their peak:
"Wilhelm Bolin, like his father, kept his Swedish citizenship. In 1904 he purchased a property in the south of Sweden which he visited each summer together with his family. Showing foresight, he opened a branch office in Bad Homburg in Germany in 1912 - a spa visited by the Tsar and his family. At the outbreak of World War I a great deal of stock remained in Germany. Taking advantage of his Swedish nationality, Wilhelm Bolin, whose Russian belongings and assets were confiscated by the Bolsheviks, transferred his German stock to Stockholm and opened a shop there in 1916. The firm exists today as Jewelers and Silversmiths to HM King Carl XVI Gustav.
It is deeply regrettable that none of the archives of the Bolin firm have, as yet, been found. A number of invoices from Bolin to the Imperial Court have been discovered in the Imperial Archives in St. Petersburg. There are certainly many more and research has been initiated to locate both them and Bolin's own records."
