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
noromance's avatar
noromance
9,404 posts
 
Crap. I’ll give you $50 for them. Lots of info here.
https://www.tubemuseum.org/ProductDetails.asp?ProductCode=SH_E88CC_1958
lowrider57's avatar
lowrider57
5,393 posts
 
Those don't look like European tube codes. Here is an example of a Siemens code...

Brand: Siemens

Type: CCa

Manufacturer and factory: Siemens Munich

Code: A6 8L-8J

Year of production: 1968

Can you look further, it's possible the code is stamped vertically.

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petg60
1,486 posts
 
1962, 1964, these are numbers printed ay the back of the tubes, front is cca.
They should have at the bottom etched codes, A1Φ (series 1 up to 65, 2 up 67 ...and so on) followed by a number noting the year (1,2,3,4,) and after month (letter) and week (number)

G
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