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headband trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Keeler
Europe: United Kingdom, England
Mid 20th c.
metal; plastic; ivorine
overall: 85 mm x 94 mm; thickness of head band: 27 mm

Trial frame. White metal. Two-part cylindrical browbar adjustable for PD and nasal height by milled wheel. Round eyes, each with double drop-cell to front and single drop-cell to back. Semi-circular white ivorine protractor scales. The whole attached via ball and socket joint to black fibre headband of adjustable size.


2017.710

Gift of Mr Nigel Wingate FCOptom, 2017



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2017.710.jpg

2017.710b.jpg

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thumbnail headband trial frame
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