[carusoracer]

Anyone assist with identifying a "G 5 Date" code for a Sylvania JAN CHS 6SN7W

Any particaular WWII vintage best

[medium jim]

Are you sure that is the date code and not the production code?  Can you post an image?

Jim

[Triode Pete]

Anyone assist with identifying a "G 5 Date" code for a Sylvania JAN CHS 6SN7W

Any particaular WWII vintage best

Mark,
The G5 indicates July 1945

Alphabetically, G= July
Numerically, 5 = 1945

In the later 1940's, a 3 digit system was employed... 826 = 26th week of 1948...

All those WWII vintages are pretty sweet, especially the metal base varieties...

Enjoy,
Pete

[carusoracer]

Thanks!

[medium jim]

For some reason, I thought the EIA coding started earlier.  Learned something new today. 

Jim