McVitie Weston valve collection, Marconi WT Co valve, type M.T.1
- Made:
- 1919
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Marconi WT Co valve, type M.T.1, etched 11016 overprinted 2025 pinch marked 2376, (RMW/J67 - McVitie Weston number), by Marconi Wireless Telegraph Company Limited, 1919.
