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Trial Frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Theodore Hamblin Ltd
Europe: United Kingdom, England, London W
Mid 20th c.
metal; celluloid
overall: 150 mm
2021.645
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Theodore Hamblin Ltd
Europe: United Kingdom, England, London W
Mid 20th c.
metal; celluloid
overall: 150 mm
Trial frame. White metal. Two black-painted round eyes suspended from cylindrical browbar adjustable for p.d. by milled control wheels at either end. White ribbed plastic nose rest adjustable for height and angle, with another milled adjustment screw. Straight flat-section sides, with bent-over ends. Semi-circular scales to upper edges. Fixed double lens clip in front of each eye and single fixed lens clip behind each eye.
2021.645
Gift of Mr Graeme Holland, 2021