The King 3B silver sonic trombone is a trombone created by the King Instrument Company. The Silver Sonic trombones have the traditional king bells that taper and are crafted from sterling silver sheet. The 3B comes in two varieties; it's either a straight horn or has an F-attachment. Some time between 1925 and 1928, The H. N. White Company introduced the "Silver Tone" Sterling Bells option to Liberty Trumpets, Master Cornets, Clarinets, and the entire Trombone line of instruments. As stated in the 1928 complete catalog, "Sterling Silver Bell produces better tone, being clearer, richer, and more resonant, with a more pleasing quality." The engravings on "Silver Tone" instruments are some of the most elaborate and attractive works of art ever produced by an American manufacturer. A short time after World War Two (1949-1951), "Silversonic" replaced "Silver Tone" and the engraving was not as elaborate (except on Artist level), but the quality of tone remained the same. In addition, Saxophones were give the option of having a Sterling Silver Bell with the introduction of the World Famous "Super 20" and later "Silversonic Super 20", which were some of the most sought after production saxophones ever made.
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