GE 6SL7GT date codes ?

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aragon63

GE 6SL7GT date codes ?
« on: 28 Sep 2019, 07:11 pm »

GE 6SL7GT silver plates with side -mounted horseshoe getter



Does anyone know what year they're made ? I know that 188-20 is NY plant but 4-13 code is mystery to me .

FullRangeMan

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Re: GE 6SL7GT date codes ?
« Reply #1 on: 28 Sep 2019, 07:22 pm »
GE 6SL7GT silver plates with side -mounted horseshoe getter



Does anyone know what year they're made ? I know that 188-20 is NY plant but 4-13 code is mystery to me .
https://www.antiqueradios.com/forums/viewtopic.php?f=19&t=230932

Tyson