Unlike Yamaha or Selmer, Hanson rarely uses letter prefixes before the number. If you see "L-5000," the 'L' is part of the model designation written elsewhere, not the serial.
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Vintage collectors prize for SA5 models, often fetching £1,500–£2,500. Modern horns (serial 7000+) typically sell for £800–£1,200 used—still excellent value, but not “collector” pricing. hanson saxophone serial numbers