Original National Coal Board negative number: D9/1045. Original Glamorgan Archives Box number: DNCB/48/13.
National Productivity Year Exhibition at Cardiff, National Coal Board Exhibit, Actual and Model of Audible Alarm System for Use Underground
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- Bookmark:http://archiveshub.jisc.ac.uk/data/gb214-dncb/dncb/14/4/147/94
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- ReferenceGB 214 DNCB/14/4/147/94
- Dates of Creation18 Sep 1963
- Physical Description1 Glass Plate Negative