Détails

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."

c. 1820-60

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