McVitie Weston valve collection, Six Sixty valve, type S.S.4075
- maker:
- Six Sixty Limited
Six Sixty valve, type S.S.4075, marked SG and 921W, glass envelope loose from base, (RMW/G129 - McVitie Weston number), by Six Sixty Limited.
Six Sixty valve, type S.S.4075, marked SG and 921W, glass envelope loose from base, (RMW/G129 - McVitie Weston number), by Six Sixty Limited.