McVitie Weston valve collection, STC valve, type VLS 492 AG
- Made:
- 1949
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© The Board of Trustees of the Science Museum
STC valve, type VLS 492 AG
Science Museum Group
© The Board of Trustees of the Science Museum
STC valve, type VLS 492 AG, surface crack round base of envelope, (RMW/Y674 - McVitie Weston number), by Standard Telephones and Cables Limited.-1949
