Trial lens set in timber case
 Catalogue Number: 2811 Trial lens set in timber case Category: Equipment Sub-Category: Trial lens case Year Of Publication/Manufacture: c 1910 Time Period: 1900 to 1939 Description Of Item: Timber case, blackwood (?), 435 mm W x 315 mm D x 60 mm H, with hinged lid and press button timber closing catch, The case is fitted to take lenses, namely 32 pairs each of unrimmed concave and convex spherical lenses and 21 pairs each of unrimmed concave and convex cylindrical lenses. Some lenses are hand etched with their power specified in inches others in dioptres, spherical to 2.5 inches (16 D) and cylindrical to 5.5 inch (7 D cyl). There are two further compartments, one containing miscellaneous lenses and other to hold a trial frame (missing). How Acquired: Donated by unknown Date Acquired: Many years prior Condition: Box good but difficult to open. Lenses need cleaning and sorting Location: Archive room. West wall. Unit 5 Drawer 4 |