This is a nice used (not abused) Zildjian K Custom Dark Crash 17" Cymbal. It was used in a church and not bashed on. I'm rating it as very good. It has aged well, with a darker patina than a new one, with obvious stick marks and fingerprints. There is no keyholing, no cracks, dents, breaks, flea bites. It's in excellent physical playing condition and sounds great.
There is a sound file of this model at the Zildjian site: https://zildjian.com/cymbals/k-family/k-custom/17-k-custom-dark-crash
Here is a description from the Zildjian site: "The dark and full-bodied K Custom Dark Crash utiilizes a special over-hammering technique that allows for a quick and bright attack with an extra fast decay. This allows for a heavier Crash to have a similiar response to a thinner and lighter cymbal, but with a lot more volume potential.
Low to Mid Pitch