The object consists of a slide rule and leather case. Handwritten on one side of the case is "H.M. Nichols BF slurlevanl Co". Printed on the other side of the case is "THE FAFNIR BEARING COMPAN, NEW BRITAIN, CONN., MAKERS OF QUALITY BALL BEARINGS". Printed on one side of the slide rule is "FAFNIR BALL BEARINGS".
