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The Datum Line System of Frame Measurement
ARCHIVAL ITEMS
letter
M. Wiseman & Company Ltd
Europe: United Kingdom, England, London EC1
1935-06-28
paper
overall: 263 x 209 mm
2002.721
ARCHIVAL ITEMS
letter
M. Wiseman & Company Ltd
Europe: United Kingdom, England, London EC1
1935-06-28
paper
overall: 263 x 209 mm
Circular letter announcing the introduction of the Datum Line System of spectacle frame measurement from 1 July 1935 and promoting the Empire Datum Frame Rule and the Empire Contourmeter. Typewritten on three sheets of paper.
2002.721
Paul Fairbanks Archive