CV1863, STC, MILITARY SPECIFICATION, 5Z4G, BROWN BASE, FOOTSCRAY, SEPTEMBER 1952 MANUFACTURE

CV1863, STC, MILITARY SPECIFICATION, 5Z4G, BROWN BASE, FOOTSCRAY, SEPTEMBER 1952 MANUFACTURE This valve shows excellent bright getter and has the inverted getter plate situated down by the pinch. It carries the STC - Brimar brand in smudged white ink. and carries a military date code showing September 1952manufacture

However, more importantly it tests as EXCELLENT using my Avo VCM163 valve tester. This exquisite device has a brown 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.