Trumpet Bottom Valve Caps Stuck

I got an issue tho. Marcinkiewicz rembrandt flugel. I use a drop of valve oil on my top and bottom valve cap threads never have had a stuck cap since i started doing this.

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Here Is Just One Example Of The Craftsmanship Found In Stomvi Instruments These Are The Clapper Valve Bottom Caps On The Custom 4 Music Stuff Trumpets Titans

Here Is Just One Example Of The Craftsmanship Found In Stomvi Instruments These Are The Clapper Valve Bottom Caps On The Custom 4 Music Stuff Trumpets Titans

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