McVitie Weston valve collection, RCA Cunningham Radiotron valve, type 89
- Made:
- 1934
- maker:
- RCA Corporation
RCA Cunningham Radiotron valve, type 89, pinch marked D4, (RMW/H25 - McVitie Weston number), by RCA Corporation, 1934.
RCA Cunningham Radiotron valve, type 89, pinch marked D4, (RMW/H25 - McVitie Weston number), by RCA Corporation, 1934.