This cornet was made by Boston Musical Instrument Manufactory in Boston, Massachusetts around 1878 to 1880. It is a B-flat/A cornet made of silver plated brass with 3 piston valves. The cornet is engraved:
Made by the BOSTON Musical Instrument Manufy.
Boston Musical Instrument Manufactory was formed when the E.G. Wright Company and Graves & Company merged in 1869. By 1902, the company name was changed to the Boston Musical Instrument Company.