and started selling how-to guides and music. Incorporated Time frame: 1922 - 1928 Products: Mouthpieces, Cornets, Trumpets Brand names: Stradivarius, Apollo, Mercury Location: 237 E. 41st Street, New York, New York Serial Numbers: 2-900 (approximate) By 1922 the company incorporated, had 10 employees and moved into a small factory at 237 E. 41st Street in New York. In 1924 Bach began producing cornets and trumpets under the Stradivarius by Vincent Bach Corporation name. In 1928, tenor and bass trombones were added to the product line as the company expanded and relocated. Bronx Time frame: 1928–1945 Products: Mouthpieces, Cornets, Trumpets, Flugelhorns, Trombones Brand names: Stradivarius, Apollo, Mercury, Mercedes Location: 621 East 216th Street, Bronx, New York Serial numbers: 1000 – 6000/6500 (approximate) In October 1928 the company opened a factory in The Bronx to produce cornets, trumpets and trombones (both tenor and bass). Shortly after this move, Bach removed the “Faciebat Anno” marking from his bell engraving that had been in use since before the 100th horn, and began stamping the bells with “Model” followed by numbers for the bell mandrel and bore size. Some horns have "New York 67" as the location on the bell and are sometimes mistaken for a "67" bell model, however 67 was the pre-zipcode postal code for the Bronx. This practice continued through most of this period. The bell mandrel number had previously appeared in Bach's script “Vincent Bach Corporation” that has been an enduring marking on Bach horns. In 1933, Bach settled on the "type-E" valve, actually according to Roy Hempley the "New type-E" appears on the first such shop cards, occasionally combining type-E with type-C or others for reasons Bach may only have known. To accommodate this, the tight "2-over, 2-under" wrap gained in height, departing further from Besson designs than the previous horns had. The company experienced stresses, but survived the depression and expanded again afterward. Post-war Time frame: 1945–1953 Products: Mouthpieces, Cornets, Trumpets, Flugelhorns, Trombones Brand names: Stradivarius, Apollo, Mercury, Mercedes Location: 621 East 216th Street, Bronx, New York Serial numbers: 6000/6500 - 12,600 (approximate) During the Second World War, Bach coped with a shortage of workers and materials and, while not converted to produce war materials as many competitors were, the company cut back on production. Throughout the early years, Bach resorted to mixing parts and modifying earlier horns returned to their ownership during this period to provide requested instruments