2A3 Bi plate
1940's 2A3 Fivre Black carbon plate with spring support filament
1940's JAN CRC VT-95 Black plate
1940's 2A3 Kenrad Black Bottle VT95
1960's 2A3 RCA Gray plate
1950's 2A3w Marconi Black plate
1940's 2A3 tungsol Black carbon plate
1960's 2A3 Westinghouse Black plate
2A3 GE Double single plate (black)
2A3 CBS Black plate blue print
2A3 CBS Black plate red print
2A3 Kenrad black glass
2A3 HALTRON black plate
