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How much are these tubes worth?

I recently acquired an HP Standing Wave Indicator and they had 2 tubes, but the prices vary from $16 to $130 from the sites I looked at. They are 2 ECC83/12AX7 with labels saying "Made in Western Germany" and "TELEFUNKEN". Any idea of how much these are worth would be much appreciated. 
baseben9
noromance's avatar
noromance
9,424 posts
 
Don't smudge the paint on the tubes!
Post removed 
jea48
4,281 posts
 
noromance1,619 posts01-04-2019 4:16pm

Don’t smudge the paint on the tubes!

+1

@ baseben9

Don’t even attempt to wipe them off. Keep your oily fingers off the white labeling.
Their value? You need to have them tested.

.
tomcy6's avatar
tomcy6
2,538 posts
 
Telefunken 12AX7 that test new are probably worth $125 and up, depending on the cosmetic condition, how closely matched the triodes are (2 triodes per tube), how much over new they test, etc.  If they test below new, the price drops rapidly.
rodman99999
5,988 posts
 
Also- check between the pins for a diamond, molded into the glass envelope’s bottom. Some other companies manufactured tubes for Telefunken. Those with diamonds are worth more, if they test well, as mentioned above. Some of the smooth plate Teles are quite rare/desirable. You may have struck gold! https://www.tubedepot.com/products/telefunken-ecc83-12ax7-smooth-plate Lots of info here, regarding the variants from Tele: http://www.audiotubes.com/12ax7.htm
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