In 1845 the business was once again moved to bigger premises by Mary and Thomas Partridge II, to Bull Street. During this period the factory was moved to Cherry Street. By the end of the 19th century, trade in Birmingham was improving and so was the Salts' business, achieving the Royal Seal of Approval and becoming in 1845 "Cutlers to Her Majesty". Still focusing on surgeons' instruments and truss manufacture in 1863 Salts was granted the Royal Warrant to become "Cutlers to the Emperor of the French" in 1867. In that same year Salts was awarded an Honorable Mention at the Paris Universal Exhibition.