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Cleaned and polished with silver polish.

Mouthpiece 5RV.

There is discoloration in the mouthpiece.

Ligature Buffet Crampom (France).

There are blue rust and darkening on the lever and key.

Key operation. No sticking keys.

Cork/Pad: Some deterioration. 

No problem in use, but maintenance is recommended. 

We have not checked the sound production by changing scales or full-scale performance.

We have not measured the sound quality by measuring instruments.