You are bidding for a quad (4 tubes) STC ITT 12E1 CV345 NOS Sealed Or Opened Sealed Matched Quad with original boxes. They were all made in England in the 1950s. Some were labeled STC some ITT. I opened some of the to take photos. Most of them are still sealed. Thus, they are all NOS and never used. These tubes can be modified with anode caps linked to pin 3 in place of KT88/6550/6L6 which seems to be a perfect experience for those who don’t want to pay much (see the last photo). There are 6 quads available. Please request the number you want. I offer free shipping by Vietnam post to regions where this service is available. If not, buyers have to pay an extra to use express shipping services like Fedex or DHL. Please ask me and wait for the total invoice to pay. Return is accepted if buyers cover the returning fees. Please ask before bidding if unsure. 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 $60. 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