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Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.
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Double concave. Optically worked glass with ground edges. Dimensions (Dia.): 50 mm.
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Double convex. Optically worked glass with ground edges. Dimensions (Dia.): 38 mm.
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Double convex. Optically worked glass with ground edges. Dimensions (Dia.): 50 mm.
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Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
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Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
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Clear glass with polished faces and ground edges. Dimensions (H x W): 50 x 45mm.
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Wood with 'V' slot to hold lenses up to 80 mm diameter.
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Plastic cylindrical lenses, W45 x FL100 mm for Ray Box OP11808.
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Metal spring clip holder with grooves to hold 50 mm round lenses or mirrors, mounted on base with slot cut out to accommodate metre or half metre rule.