MusEYEum Online Catalogue

Welcome to the online catalogue of the British Optical Association Museum. Here you can search for both museum artifacts and archives. Data is transferred from our Collections Management System to this website on a regular basis.

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ARCHIVAL ITEMS
selection chart
Averlan Company Limited
Europe: United Kingdom
Mid-late 20th c.
plastic
overall: 205 x 56 mm

'Slide-rule' type calculating chart. Obverse = vertex distance and computed power; Reverse = Ultra thin fitting guide. White inner card. Blue outer sheath overprinted in black.


2005.46

Gift of A.J. Backhouse, 2003



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