NOS GE 6201 12AT7-WA ECC801S MATCHED PAIR TESTED TUBES "TRIPLE-MICA 5-STAR" 1957
6201 = ECC801S = E81CC. 6201 = 12AT7WA = ECC801S = E81CC = CV3508 = CV5212. It is often used for Hi-Fi applications. It provides very smooth mids and high end with a lot of detail. THE 3-MICA 6201!