2. vintage
  3. 163402-79323

Any tube experts out there?

Cleaning out and organizing my audio and camera closet I got all the way to the back where I founds something I had long forgotten I had...... bought maybe 15 or more years ago. A pair of Siemens and Halske 6922 CCa Grey Plates with round getter and the following codes.... 34.210 and 32.176. In the dark recesses of my memory I remember buying a few pairs of NOS of these 15 or 16 years ago... pins and writing on the tubes is immaculate, like brand new.
Anyone got an idea what date these are? I had gotten some real beauties from this guy back them.. 1958 Pinched Waist Valvos and other stuff you just didn’t see, even back then..
midareff1

Showing 1 response by tomcy6

tomcy6's avatar
tomcy6
2,541 posts
 
The best I can come up with is that they are pre-1960 CCa:

https://www.tubemuseum.org/SearchResults.asp?Cat=24

For the old "Gray-Plate" early 1960's SIEMENS HALSKE E88CC and CCa:

Make sure you are buying Real Siemens Halske CCa = E88CC / 6922 tubes - They have the double-stage getter frame-grid construction, Gray separator or Gray Electro-static shield, 4 seams on top and numbers in the glass between the pins and the Siemens & Halske S+H logo on the front of the tube

with "painted serial numbers" for the pre-1960 versions

 and ACID-CODES for the 1960 - 1965 versions. After 1966 the acid-codes may change to codes stamped on tiny metal rectangles soldered onto the sides.
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