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ML4, MARCONI OSRAM, AIR MINISTRY, 10E/17,
ML4, MARCONI OSRAM, AIR MINISTRY, 10E/17, Beautiful screeded broad ST19 bulb, black base, today we have a Marconi Osram ML4 having white inked markings and a circular MWT blue & white round decal to the obverse. The device has been tested using our VCM163 valve tester and shows good emission.
