Simple single drop-cell trial frame
 Catalogue Number: 4471 Simple single drop-cell trial frame Category: Equipment Sub-Category: Trial Frame Year Of Publication/Manufacture: Late 19th century Time Period: 19th C Description Of Item: Early single-celled trial frame of nickel plated metal. Saddle bridge, straight sides, fixed PD, no axis scale for cylindrical lenses. Frame front 123mm W x 25 mm H. Condition: Very good Location: Archive Office. Spectacles cabinet Drawer 5 |