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5Z4G, BRIMAR, ENVELOPE DATE CODE FOR OCTOBER 1959, BLACK BASE
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5Z4G, BRIMAR, ENVELOPE DATE CODE FOR OCTOBER 1959, BLACK BASE 5Z4G, BRIMAR, ENVELOPE DATE CODE FOR OCTOBER 1959, BLACK BASE

5Z4G, BRIMAR, ENVELOPE DATE CODE FOR OCTOBER 1959, BLACK BASE

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5Z4G, BRIMAR, GREY PRINT OCTAGON CARTOUCHE, BLACK BASE

This valve shows excellent bright getter and has the  getter ring situated down by the pinch. 

However, more importantly it tests as EXCELLENT using my Avo VCM163 valve tester. This exquisite device has a black low loss micanol base which is tight to the envelope and the pins are clean, straight and uncorroded. 

Device specification 60mA delivery for both diode sections. So you can see we have 100% emission from this venerable beauty. 

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