ID this tube for me.

schmee

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It's a 'Silvertone' set, 6L6GC rebrand. Halo getter, grey plate.
I think maybe RCA grey plates... I dont have any RCA's left to compare.

006.JPG 007.JPG
 

uriah1

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Silver tone used both GE and RCA

Usually the GE I have seen had the dots under tube type

Here are some examples rca

 

schmee

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I sold a bunch of tubes in 2021 so don't have many comparable's anymore. I do have WGB sets but they are different.

Some RCA would have the 'stop sign' around the numbers...although IIRC not all years did.
GE has dots under the numbers.
I have one Sylvania 6L6GC here but it has a side halo getter.

Unfortunately they dont match bias very well in the amp. I have three sets of WGB's that match within 1-2 ma.
It appears they are RCA Grey Plates:
 
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