
McVitie Weston valve collection, Marconi WT Co Round valve, type V.24
Marconi WT Co. valve, type V.24, marked 4137, (RMW/B102* - McVitie Weston number), by Marconi Wireless Telegraph Company Limited.
Marconi WT Co. valve, type V.24, marked 4137, (RMW/B102* - McVitie Weston number), by Marconi Wireless Telegraph Company Limited.