Bach Genuine Trumpet Finger Buttons - Set of 3

Genuine Bach Trumpet Finger Buttons (Set of 3)
This is a set of 3 genuine Bach trumpet finger buttons.

They were originally attached to a Stradivarius lacquer trumpet and have been owned for over 10 years.
They were used for about 5-6 years.
Some of the buttons have a slightly rough surface.
There are some scratches and scuffs.

Personally, I believe I used them with great care...
However, as they are used items, I would like to offer them to someone who understands this.

I sincerely apologize, but...
I am unable to negotiate prices, so please refrain from making offers.

Thank you for your understanding.