Baldwin Select Sylvania 12AU7 12AU7A ECC83 Vacuum Tube Valve With An Introduction but that was the fashion

but that was the fashion back in the 1940s

IN NEARLY 9000 SALES

a balloon / globe bottle

They have NU 188-5 and 3-09 188-5 date/provenance codes

there are a few scratches

Baldwin Select Sylvania 12AU7 12AU7A ECC83 Vacuum Tube Valve With An Introduction but that was the fashionThis Sylvania MANUFACTURED, Baldwin BRANDED and SELECTED 12AU7A ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured an almost perfectly balanced 82 84 where minimum (65%) is 56 56 and 100% is 86 86. This tube has narrow, gray, 16 MM plates; excellent flashing; a top, O getter; copper support rods; excellent silkscreening and 312 132 provenance date