This is a 1928 H. N. White King Silvertone Artist Model 1450 trombone with a sterling silver bell in original condition. In 1928 King started making the Silvertone. This is an early Silvertone, serial #1075XX. It plays very well and the slide moves freely. It is a dual bore  .461" and .481". I'd give the slide action a B+/A-. It needs slide bumpers where the slide goes back to first position. It comes with a King M21 mouthpiece, lyre, oil container, and case key in fantastic shape. The bell is the optional larger diameter at  7" inches and has the ornate, stunning engraving with gold inlay. Please look at the detailed pictures for condition. It will be carefully packed and to the shipper with insurance in less than 24 hours.