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| Archive Reference / Library Class No. | NCB/G/AGR/19 |
| Former Reference | D4774/1/1/19 |
| Title | Correspondence on tender by Dictograph Telephones Limietd of Sheffield for the National Coal Board, on the supply and maintenance of automatic telephone system for Avenue Coke Oven and Chemical Plant and Offices |
| Date | Apr 1954-Aug 1954 |
| Description | Including chart of intercommunication for the Carbonisation Plant at Avenue, 26 July 1954. |
| Extent | 1 file |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | Coal Products Division |
| National Coal Board |
| Format | Document |