Alvarez classical guitar, acoustic with factory pickup, used and in good condition.  This was my main touring and recording guitar for many years.  I loved it and it has a great sound.  I recently lost the volume control button and all Alvarez had was another bass button.  So, I replaced it with another bass button. I believe the button is hiding in some part of my studio and I will keep looking for it in order to forward it on to the purchaser of this guitar, if I find it.