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Graph
Printed in black ink with handwritten details. Sixteen circular graphs - 'Simmance's Deadbeat Recorder'. Dates given on the graphs are for January 1935. Loose within a green card file with all other documents with accession number 83.184I/67. The file is labelled 'Colliery Boiler Plant B31', 'Cefn Coed Data' and 'Colliery Engineering'.
Collection Area
Industry
Item Number
83.184I/67 (8)
Acquisition
Collected officially, 20/12/1983
Measurements
diameter
(mm): 205
Material
paper
Location
In store
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