Re: King Super 20 Silversonic Tenor Serial #410000
Generally speaking, most collectors agree that horns made around 426,000, when H. N. White moved the production from Cleveland to a new facility at Eastlake, Ohio, began to show a decline in quality, and many cost cutting measures were made to the horns. This was around about the time the underslung octave mechanism was discontinued. King Super 20 Silver sonics were not a profitable horn for H. N. White, and they lost money on each horn made, leading to the end of production for this model around 1975. The last horns were definitely not in the same class as the more coveted earlier models.
Your horn is, in my opinion made before the waning years and should be a nice horn.