J117 text
ID: 535639
This article refers to the component: To the tube/semiconductor
J117 text
27.Feb.20 01:11
787
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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