What is the difference between the different finish options on Trumpets,Trombones and Saxophones?

What is the difference between the different finish options on Trumpets,Trombones and Saxophones? | MusiciansBuy

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Selmer Supreme antique « Tenor Saxophone

This model is a perfect student Saxophone which features a high F# key and a quality case. Montreux is a leading brand of premium student instruments

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