McVitie Weston valve collection, Raytheon valve, type RK-39
Raytheon valve, type RK-39, marked Inoperable sample, ceramic base, (RMW/J145 - McVitie Weston number), by Raytheon Manufacturing Company.
Raytheon valve, type RK-39, marked Inoperable sample, ceramic base, (RMW/J145 - McVitie Weston number), by Raytheon Manufacturing Company.