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The ABDO Rule
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Association of British Dispensing Opticians; Premier Plastics
Europe: United Kingdom, England, Norfolk, Thetford
Late 20th c.
plastic
overall: 60 mm x 160 mm x 3.5 mm
2013.263
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Association of British Dispensing Opticians; Premier Plastics
Europe: United Kingdom, England, Norfolk, Thetford
Late 20th c.
plastic
overall: 60 mm x 160 mm x 3.5 mm
Optician's frame rule. White plastic, with straight unbevelled black-coloured edges. Marked on both sides with various scales including pad bridge and regular bridge frame measurements, eye size, box centre distance and horizontal centre line, angle of side, length of side, angle of side, angle of crest of bridge, apical radius.
2013.263
Gift of Mr Brian Mitchell, 2013