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simple trial frame
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Early 20th c.
metal
eye: 38 mm; overall (front, excluding sides): 121 mm; side: 152 mm
2011.756
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial frame
Early 20th c.
metal
eye: 38 mm; overall (front, excluding sides): 121 mm; side: 152 mm
Double drop cell trial frame. Non-adjustable. White metal rounded edge rear section including C-bridge and joints. Flat-edged front section with fenestration to flattened base. Half oval eyes. Metal scales with flattened bottoms, marked 0-180. Thin straight sides with spatula ends.
2011.756
Gift of Mrs Jill Evershed Martin, 2011