Small lens clock
 Catalogue Number: 1132 Small lens clock Category: Equipment Sub-Category: Lens measure, lens clock Year Of Publication/Manufacture: c1915 Time Period: 1900 to 1939 Place Of Publication/Manufacture: United Kingdom Description Of Item: Small lens clock to measure spectacle lens surface curvature, calibrated in Dioptres ( + & - 0 to 10). Chromed brass & glassMarked: BRITISH MADE/ ENG. PAT. 28764.11/ USA APRIL 20 15/ BREVETTE/ DRP. Diam: 3.7 cm Historical Significance: BREVETTE / DRP means 'Patented Deutsches Reichspatent'. Another example of this lens measure is at cat no, 2903. Condition: Very good Location: Archive office. East wall shelves unit 3. Drawer 1 |