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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A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972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
8 - Butterley Company Colliery Offices correspondence files on the development of pit supports and other mining equipment - 1929-1947
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Archive Reference / Library Class No.
NCB/A/BUT/13/8/4
Former Reference
N5/209
Title
Butterley Company correspondence file on the Butterley Patent F-Type Pit Prop
Date
Sep 1940-Jan 1947
Description
Including printed specification for patent, 1939
Extent
1 file
Level
File
Repository
Derbyshire Record Office
Archive Creator
Butterley Company
National Coal Board
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Harpur Crewe family of Calke
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