Up for sale here is this used vintage 12AT7/ECC81 vacuum tube. This is marked Mullard Made in Great Britain, but it has a TK1 ROK4 etched-glass code, so I believe it is actually a rebadged Amperex tube. This has great lettering, short gray plates, and a top square getter. The etched-glass date code is 1960, but the printed date is 1961.

I tested it on my B&K 747B tube tester, and it tested at 92/92, with no shorts or grid emission, on a scale of 0-120, where 65 is minimum good. This is a super strong balanced tube and is guaranteed to work well for you. Please see my pictures for details.

US shipping and handling is $7, and international is $21, no matter what quantity you buy. All of my small parts are set up for combined shipping--just use the "add to cart" feature and then check out at once, and the shipping will be automatically discounted. If you have any questions, please ask.

I have more tubes and other vintage electronics listed--feel free to take a look!