McVitie Weston valve collection, RCA Radiotron valve, type UX-250
- maker:
- RCA Corporation
RCA Radiotron valve, type UX-250, (RMW/D155 - McVitie Weston number), by RCA Corporation.
RCA Radiotron valve, type UX-250, (RMW/D155 - McVitie Weston number), by RCA Corporation.