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| Archive Reference / Library Class No. | NCB/A/BUT/13/4/53 |
| Former Reference | N5/399 |
| Title | File of charts and tables relating to the output and costs/proceeds at Ollerton Colliery, including comparisons with the other collieries owned by the Butterley Company and other Nottinghamshire colliery companies. |
| Date | 1928-1936 |
| Description | A plan of the Top Hard Coal workings dated 29th Feb 1936 is included. Some of the larger pages are annotated. |
| Extent | 1 file |
| Level | File |
| Repository | Derbyshire Record Office |
| Archive Creator | Butterley Company |
| National Coal Board |