McVitie Weston valve collection, Ken-Rad valve, type 6F7
- Made:
- 1934
Ken-Rad valve, type 6F7, domed envelope, pinch marked B36, (RMW/Y550A - McVitie Weston number), by Ken-Rad Tube & Lamp Corporation, 1934.
Ken-Rad valve, type 6F7, domed envelope, pinch marked B36, (RMW/Y550A - McVitie Weston number), by Ken-Rad Tube & Lamp Corporation, 1934.