EL34 RFT East Germany 6CA7

Without boxes, but tubes and printing on tubes are perfect! I’ve seen these tubes under a lot of various logos like Siemens, Lorenz, Philips, Telefunken especially. They have been made in few versions, from flat foil disc getter to small halo. Very long lasting EL34. I suppose that these tubes are from late 70s, single O getter, four stapled plates, two slots version.

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