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Large Bjerke Spectacle Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Carl Zeiss (Jena)
Europe: Germany, Thüringen, Jena
1920s?
metal; wood
case: 70 x 182 x 116 mm
2003.222
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Carl Zeiss (Jena)
Europe: Germany, Thüringen, Jena
1920s?
metal; wood
case: 70 x 182 x 116 mm
Trial frame. White metal frame. Adjustable nose and P.D. Capacity twelve trial lenses. Large five-grooved lens clips in front of eyes and single lens clip behind. Front clips revolve. White half-eye scales marked 0-140. Centre joints. Fully reversible straight sides, adjustable for angle, with attached wire curl side terminals. In original hinged wooden case with white metal sliding catch. Also a printed and illustrated instruction leaflet.
2003.222
Ex Keeler Collection