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The New Optrex Datum Rule
MANUFACTURING AND DISPENSING EQUIPMENT
datum rule
John Baird & Sons
Europe: United Kingdom, Scotland
Post 1929
plastic
overall: 203 x 100 mm
2001.282
MANUFACTURING AND DISPENSING EQUIPMENT
datum rule
John Baird & Sons
Europe: United Kingdom, Scotland
Post 1929
plastic
overall: 203 x 100 mm
White plastic datum rule, marked with black scales but missing its parallel bars.
2001.282
Gift of Arthur C. Mawson in memory of H.P. Southcott, 2001