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TitleMakerDate Made
bifocal segment measurePastore Enterprises1976View
bifocal segment measureRaphael's LtdEarly 1970sView
London Segment Height DeterminatorLondon Optical Company Ltdmid 20th c.View
London Segment Height DeterminatorLondon Optical Company Ltdmid 20th c.View
Seg-DeterminatorPell Optical Co; London Optical Company Ltd20th c.View
Ultravue Dispensing TemplateAmerican Optical CompanyLate 1970s?View

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