Purchased on Mercari. I tried it out and then it sat unused. There are also dents, so please refrain from purchasing if you are concerned about this. I polished it and cleaned it, but I couldn't remove all the dirt. ↓ The following is the previous seller's description: Made in Germany The JK 1EK throat has been modified to 4.3mm. The cup is a little shallow, making it easier to play high notes, and the throat is wider, allowing for a rich sound.