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trial case / neutralising set
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
wood; metal; glass
1999.3165
TRIAL CASES, FRAMES AND REFRACTOR HEADS
trial case
wood; metal; glass
Wooden trial case. Hinged at narrow side. Hook clasp. Handwritten key running down centre. Contains 18 convex lenses in yellow metal frames with handles. (2 gaps). 19 concave lenses in white metal frames with handles. (1 gap).
1999.3165