Record

NCB - National Coal Board, later British Coal Corporation - 1574-1994
- A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972
  - BUT - Butterley Company Colliery Offices - 1857-1960
    - 13 - Butterley Company Colliery Offices records on the development of collieries - 1895-1947
      - 7 - Butterley Company Colliery Offices correspondence files on the development of machinery in the Company's collieries - 1932-1947

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Archive Reference / Library Class No.	NCB/A/BUT/13/7/14
Former Reference	N5/252
Title	Butterley Company correspondence file on the development of the High Main Coal Seam at Kirkby Colliery
Date	Oct 1942-Mar 1946
Description	Including analysis of the quality of the Lowmoor, Bestwood and Kirkby High Main coal, Oct 1942-Jan 1943, report on quality of coal from Kirkby Hign Main, Dec 1943-Aug 1944, reports, plans and papers on mechanisation project and provision of equipment on rental tems approved by the Ministry of Fuel and Power, Oct 1944-March 1946, and loose plans (3) of Kirkby High Main Seam
Extent	1 file
Level	File
Repository	Derbyshire Record Office
Archive Creator	Butterley Company
Archive Creator	National Coal Board

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