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TRIAL CASES, FRAMES AND REFRACTOR HEADS
M. Wiseman & Company Ltd
Europe: United Kingdom, England, London
Mid 20th c.
Trial frame. Black and grey metal. Cylindrical browbar adjustable for PD by milled wheels at each end. Separately adjusted nasal rest with black plastic nose pad. Sprung black metal centre joints with metal sliding sides also of adjustable inclination via long milled control knobs. Black plastic end covers. Round eyes rotatable via milled wheels to sides, each with triple lens clip to front and single downwards-pointing lens clip to back.
Gift of Mr Brian Mitchell, FBDO, 2004