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bec mouthpieces Nicolas Trefeil mouthpieces museum bec musee Otto Link serial number STM double ring long tooth rest

"Super Tone Master"

  Double ring -  long tooth rest.
  (New York, October 1949 > ?)
 
 

 
  Update 29 08 2023
bec mouthpieces Nicolas Trefeil mouthpieces museum bec musee Otto Link serial number STM double ring long tooth rest
bec mouthpieces Nicolas Trefeil mouthpieces museum bec musee Otto Link serial number STM double ring long tooth rest 1950 ad
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