Name	Keuffel & Esser Celanese Celcon Pocket Slide Rule, special order, and very difficult to produce.
Front Scales	DF =CF CI C = D L
Back Scales	K A = B ST S = D T
Type of Rule
Material	Made using the Celanese light green resin
Dimension (mm)
Area of Use
Origin of Rule	Michael O'Leary
Match Number	4479
Comment
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