The product is a used JAN-CBRZ /12AU7 vacuum tube manufactured by Lansdale Tube Co. in 1956. This vintage audio part is a 12AU7/6189 model known for its quality and durability in vintage electronics applications. With a unit quantity of 1, this tube is a valuable collector's item for those seeking to restore or replicate vintage audio equipment from the mid-20th century.

Note: Tested on calibrated Heathkit TT-1 Tube Tester measuring 1125/1200 microhomos with a minimum r/p of 710 microhomos, missing original box label faded showing signs due to long term storage. Please see photos. Thank you.