F.185 Data Sheet MJS-p-0209

K&E, 4133, 1913-1922

Serial Number or Date Stamp:

Country: USA Primary construction material: wd Case included?: no

General Description: Specialty linear electro slide rule

Length of 1 decade = 8 in, and overall scale length = 8 in. The largest physical dimension is 8 in.

Front Scales: in /| A [ B C ] D || B&SGauge < CurrRatings >

Back Scales: cm [ S L T ]

Notes: Roylance Electrical Slide Rule, mahogany, early release; prod mark 255; used and in poor condition; missing original 3-hairline cursor

References: JOS6.2p39 (1997); https://www.mccoys-kecatalogs.com/KECollection/4133/ke4133familyrules.htm

Date Acquired: 08/12/2021