【Product Name】 National Vacuum Tube BL-2 80 - Power-On Confirmed 【Description】 This is a National vacuum tube "BL-2 80". This vacuum tube model is popular as a repair/replacement part for vintage equipment and is a rare item. Operation has been confirmed with power, but due to its age, detailed performance guarantees cannot be provided. Recommended for audio enthusiasts, collectors, and those looking for repair parts. 【Condition】 ・Power-on confirmed ・Signs of use, scuffs, and scratches commensurate with age ・No cracks in the glass ・Please check the details in the images 【Main Specifications】 ・Manufacturer: National ・Model: BL-2 80 ・Type: Vacuum Tube 【Recommended Points】 ・Rare vintage vacuum tube ・Ideal as a repair/replacement part ・A perfect item for collection 【Notes】 ・This is a pre-owned item (secondary distribution), so please purchase only if you understand this. ・The items for sale are all those shown in the images. No claims or returns are accepted. ・Serial numbers, etc., are recorded to prevent swapping. ・It is also listed on other sites, and will be removed when sold.