F.199 Data Sheet MJS-p-0231

K&E, American/Favorite, c.1898

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 = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.

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

Back Scales: [ S L T ]

Notes: no model number or patent info; labeled as Keuffel & Esser Co. N.Y. on LHS of slide; metal cursor; prod. marks 59 on LHS end; extended cm scale in well; similar to early American example, though markings on case say Favorite; pi gauge marks on A/B; lid to case missing; early predecessor to 4054

References: https://www.mccoys-kecatalogs.com/KECollection/4054/ke4054familyrules.htm

Date Acquired: 12/02/2021