Details

W-227

Slide Rule: Double

Same construction, numbering, and specific points designated as W-144. Difference lies in materials, and use of wooden tracks inserted in the ivory to create the grooves in which the slides move.

"J. LONG MAKER 43 EASTCHEAP LONDON."

ivory, silvered brass

England

	Imperial(in)		Metric(cm)
Height			0.9
Width			32.2
Depth			5
Diameter
Circumference

	Imperial(in)		Metric(cm)
Height
Width
Depth
Diameter