Ophthalmic lens blank in Slimline 730 high-index glass, refractive index 1.7, clear, by Chance-Pilkington, St Asaph, Denbighshire, Wales, United Kingdom, 1986-1987 Ophthalmic lens blank in Slimline 730 high-index glass 1986-1987
Ophthalmic lens blank in Slimline Brown 730 high-index glass refractive index 1.8, brown tint, by Chance-Pilkington, St Asaph, Denbighshire, Wales, United Kingdom, 1986-1987 Ophthalmic lens blank in Slimline Brown 730 high-index glass refractive index 1.8 1986-1987
Ophthalmic lens blank in Slimline 730 high-index glass, refractive index 1.7, clear, by Chance-Pilkington, St Asaph, Denbighshire, Wales, United Kingdom, 1986-1987 Ophthalmic lens blank in Slimline 730 high-index glass 1986-1987