Small lens measure
 Catalogue Number: 2903 Small lens measure Category: Equipment Sub-Category: Lens measure, lens clock Year Of Publication/Manufacture: 1915 Time Period: 1900 to 1939 Place Of Publication/Manufacture: Britain Description Of Item: Small glass-faced lens measure for measuring the curvature of the front and back surfaces of ophthalmic lenses, 36 mm dia. 9 mm deep. Made of chromed brass and glass with white clock face under the curved protective glass cover with black dioptre scale from ? 10 D, with black rotating pointer. Three pins under protective metal cover and metal loop for attaching a chain or cord. Marked ' BRITISH MADE / ENG PAT. 287642.11 / USA APRIL 20 15 / BREVETTE / DRP' Historical Significance: BREVETTE / DRP means 'Patented Deutsches Reichspatent'. Another example of this lens measure is at Cat no. 1130. How Acquired: Donated by Estate of William Cooper, via Peter Lewis Date Acquired: April 2016 Condition: Very good except for loss of chrome plating along part of top edge and scale does not zero Location: Documents Room Red Daytona Cabinet Drawer 5 |