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TitleMakerDate Made
Chappell DatumsetPell Optical Co20th c.View
Chappell DatumsetPell Optical Coc.1967View
Chappell DatumsetPell Optical Coc.1967View
Chappell DatumsetPell Optical Co20th c.View
Chappell DatumsetPell Optical Co20th c.View
Datum Line GuideR. Archer & Sons Ltdc.1930View
Datum RuleWillesden Optical Works Ltd20th c.View
Empire Contourmeter and Datum frame rule & caseM. Wiseman & Company LtdMid 20th c.View
Empire Datum (Frame) RuleMid 20th c.View
Empire Datum Frame RuleM. Wiseman & Company Ltd20th c.View
Empire Datum Frame Rule with parallelogramM. Wiseman & Company Ltd20th c.View
Empire Datum Frame Rule with parallelogramM. Wiseman & Company LtdMid 20th c.View
Empire Datum Frame Rule with parallelogramM. Wiseman & Company Ltd20th c.View
Empire Datum Frame Rule with parallelogramM. Wiseman & Company Ltd20th c.View
The 'Optrex' RuleJohn Baird & SonsEarly-Mid 20th c.View
The New Optrex Datum RuleJohn Baird & SonsPost 1929View
The New Optrex Datum RuleJohn Baird & SonsPost 1929View
The New Optrex Datum RuleJohn Baird & Sons20th c.View
Wiseco Datum Peg SetM. Wiseman & Company Ltd20th c.View
WOW Datum RuleWillesden Optical Works LtdMid 20th c.View

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