This is a Knilling 3/4 flatback bass with a carved top that I purchased about 20 years ago. I was never successful in making the transition to upright bass so it has spent almost the entire 20 years in a gig bag in the corner of my bedroom. It has never even had a setup done on it. One of the close up pics is of the only significant flaw I can find on the bass and it is very small. I would be interested in trading for a MTD 535. I am willing to drive some distance to meet a serious buyer.