Name	Keuffel & Esser 9068 Doric Plastic Slide Rule with trig scales in degrees and minutes. Replaced by 4168 in 1952
Front Scales	K A = B ST S = D T
Back Scales	DF = CF CI C = D L
Type of Rule
Material	Engine Divided White Xylonite
Dimension (mm)
Area of Use
Origin of Rule	Michael O'Leary
Match Number	4477
Comment
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