Name	Keuffel & Esser N < 4123 > Roylance
Front Scales	8inch / A = B CI C = D ] 3 scales B&S GAUGE
Back Scales	= S L T =
Type of Rule	slide rule
Material	engine divided celluloid laminated mahogany
Dimension (mm)
Area of Use	generic
Origin of Rule	Michael O'Leary
Match Number	3640
Comment
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