McVitie Weston valve collection, Raytheon valve, type RAY X 171A
Raytheon valve, type RAY X 171A, marked 199, (RMW/D148 - McVitie Weston number), by Raytheon Manufacturing Company.
Raytheon valve, type RAY X 171A, marked 199, (RMW/D148 - McVitie Weston number), by Raytheon Manufacturing Company.