does it have branches in other countries too?
Yes, St. Louis, Missouri.
Mercury Records
Mercury opened two pressing plants, one in Chicago and the other in St. Louis, Missouri. 
what is sons of soul? Third album by American R&B band Tony! Toni! Toné! when was it released? June 22, 1993 which was their first album? Who and when was this released? April 18, 1988 who released the third album? Wing Records and Mercury Records. where is the first one located? UNANSWERABLE and where is the later located? Chicago when did it start? 1945
wiki:4795711
Mercury Records [SEP] Beginnings
Mercury Record Corporation was formed in Chicago in 1945 by Irving Green, Berle Adams, Ray Greenberg and Arthur Talmadge. They were a major force in jazz and blues, classical music, rock and roll, and country music recordings. Early in the label's history, Mercury opened two pressing plants, one in Chicago and the other in St. Louis, Missouri. With the use of automatic presses and providing 24-hour turnaround, they aimed for direct competition with the major recording labels, Columbia, Decca, Capitol and RCA Victor. By hiring two promoters, Tiny Hill and Jimmy Hilliard, they penetrated the pop market with names such as Frankie Laine, Vic Damone, Tony Fontane and Patti Page.