F.210 Data Sheet MJS-p-0300

K&E, Mystery, 1933

Serial Number or Date Stamp: 434587

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

General Description: Basic linear polyphase 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 DF [ CF CI C ] D K || cm

Back Scales: [ S B L T ]

Notes: no model number, no patent info; K+E on slide; same scale set as 4097D 5-inch; nice condition; improved metal cursor; leather case with belt loop; owner C.E. Howard

References: http://www.mccoys-kecatalogs.com/KECollection/Mystery/kemysteryfamilyrules.htm

Date Acquired: 04/29/2023