These vintage RCA 12AT7 tubes are a rare find for any audiophile. Made in the United States, these NOS tubes are perfect for restoring your vintage black plate guitar amplifier. The brand RCA is known for its high-quality audio equipment, and these tubes are no exception. The model 12AT7 is a popular choice for guitar enthusiasts and collectors alike. These tubes are perfect for vintage parts and accessories, and are sure to add a touch of authenticity to your collection. Don't miss out on this opportunity to own a piece of vintage electronics history.