Marconi
| Brand on Tube | Marconi |
|---|---|
| Extended Brand Name | The Marconi Co. Ltd. |
|
|
|
| Country | Great Britain |
| Etched code on Tube | I63 B |
| Factory Code | B - Mullard, Blackburn |
| Tip Shape | Pinched Tip |
| Glass Color | Clear Glass |
| Mica | Double |
| Getter | O-Getter Halo |
| Getter Support | One |
| Plate Look | Ribbed / Scale |
| Plate Size | 14mm |
| Plate Color | Matte Gray |
| Pin Color | Silver Pins |
