J117 text

ID: 535639
This article refers to the component: To the tube/semiconductor

J117 text 
27.Feb.20 01:11
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Robert Gillespie (USA)
Articles: 2
Count of Thanks: 5
Robert Gillespie

Around top of tube -

"CONNECTICUT"

"VACUUM TUBE DETECTOR"

"TYPE J-117. MADE IN U.S.A."

Around bottom of tube -

"PAT'D JAN. 14. 1919 OTHERS"

"PENDING. IN CANADA &"

"PRINCIPAL FOREIGN COUNTRIES"

Serial on glass marked "4980 B"

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