You are bidding for one Brimar Cossor 6SN7GT 5692 VT-231 Black Plate used good Tested Balanced. These were made in 1940s with special anti-vibration mica with 4 prongs. They are carefully tested on my TV-7U at the NOS range as in the photos. These tubes sound superb in my hifi system. Return is accepted if you pay for the return shipping fees. Thanks

P/S: The shipping fees in the listing is by regular mail (normally Vietnam post) taking from 12-25 days depending on buyers' local customs. To some regions, it can take even longer than that. Besides, Vietnam post is not always available to some countries in South America, Northern Europe or Africa. Please ask me before paying. If you want to use express shipping services like DHL, Fedex or UPS express taking 3-7 working days, you have to pay an extra of around $68.75. (For order over $1000, Express shipping service is a must. Please wait for the invoice to pay). Please let me know so that I can send you an invoice. If the item(s) purchased may not arrive or faulty, please don't hesitate to contact me before opening cases on ebay. I am willing to reach to a solution and make you completely satisfied. Thanks a million