F.162 Data Sheet MJS-p-0390

K&E, 4051, 1906-1910

Serial Number or Date Stamp:

Country: USA Primary construction material: wd Case included?: yes

General Description: Basic linear Mannheim slide rule

Length of 1 decade = 20 in, and overall scale length = 20 in. The largest physical dimension is 20 in.

Front Scales: in /| A [ B C ] D || cm < cm >

Back Scales: [ S T L ]

Notes: Early 20-inch Mannheim Rule in nice condition; prod. mark 156 on end of rule; square metal/glass cursor; pi gauge mark; fine L scale, 0 to 1000; first version labeled 4051

References: http://www.mccoys-kecatalogs.com/KECatalogs/1901/1901kecatp294.htm; https://osgalleries.org/collectors/tarantolo/kande4051_info_and_image.cgi?string=KEU316

Date Acquired: 07/16/2025