K&E 4031 5" Mannheim 1914-1915

These scans are from the collection of Clark McCoy

This slide rule has several unique features:

• The scale set has fine graduations equivalent to the 10" 4041.
• The blocks supporting the glass cursor are made of metal not plastic.
• The rule came originally with a magnifier.

Front side

Back side of slide

Rear side

Bottom edge with magnifier

Top edge with magnifier

Close up view of back of cursor

4031 with magnifier

Left end view with magnifier