I have an 18" K dark med-thin crash and a 19" K dark med-thin crash. I bought the 18" new and the 19" a week before off ebay. The seller claimed it was only 3 months old and it appeared to be, so I took his word for it. But there's something different about the logos on it and I've noticed them on other K's. My 18" has the Zildjian logo on the bottom and my 19" has a K logo on the bottom. Its not really a big deal, but I am curious is to why. Thanks.