Set of 4 NEC vacuum tubes, made in Tokyo. Compatible with 12AX7 - Brand: NEC 5751 - Product Name: Vacuum Tube - Country of Origin: Japan - Quantity: Set of 4 Box has scratches. These are from an estate and the functionality has not been confirmed as there is no measuring device. This is an as-is sale. Please check the condition in the photos. Please understand and purchase accordingly. These are old items that have been stored at home for a long time. No returns accepted. 13