c. 1860—New York

In a catalog labeled “Appendix to our Musical Merchandise Catalogue,” John F. Stratton offers an “E-flat Alto Trombone” under the category of “Stratton ‘Concerto’ Trombones.” Pictured is an engraving of a valve alto trombone that is shorter than the B-flat tenor pictured (University of California, Santa Barbara Romaine Collection).