In this sale we offer a pair of vintage X-201-A and 201-A globe style triode radio tubes.There is a Songbird X-201-A and a Silvertone 201-A.Both have hot stamped bases.These tubes tested with very good emission on my Eico model 666 Dynamic Conductance tester with no shorts or leakage. On the meter percentage scale of 0-140, with a minimum good of 80, the Silvertone tested at 120 and the Songbird at 130.Not tested for sound/noise quality in any type of equipment.PLEASE FEEL FREE TO ASK ...ANY QUESTIONS YOU MAY HAVE ABOUT THIS ITEM. INSPECT ALL PHOTOS CAREFULLY. CHECK MY FEEDBACK AND BID or BUY WITH THE CONFIDENCE THAT YOU WILL RECEIVE PROMPT PROFESSIONAL SERVICE.Thanks for viewing our radio tubes!