Ophthalmic lens blank in crown glass of refractive index 1.523, Crookes B2 dark neutral tint, type SC4, by Chance-Pilkington, St Asaph, Denbighshire, Wales, United Kingdom, 1986-1987
- Object Number:
- ophthalmic lens blank
- component - object
- spectacles component
- ophthalmic lens
- Permanent collection
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