You are bidding for one tube Thomson CSF 5687wa = Bendix 6900 Black Plates, Grid gold, Copper Rods NOS sealed Open Super Rare. The tubes were made for military purposes with long life and deadly quiet. The sounding is much better than 5687 family on the market. There are many in stock so matchex pairs, matched quads are availble on request. All the tubes are teated on my tube testers: TV-7,  to make sure they are tightly matched. All the tubes sold from our stock are under 30-day warranty since arrival. Thus, please buy them confidently. Return is accepted and buyers pay the returning fees. Please ask me any question before bidding. Thanks a million

Price is per one tube

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