F.59 Data Sheet MJS-p-0087

Engineering Instruments, 250-BT, c.1960

Serial Number or Date Stamp:

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

General Description: Basic linear beginner/student polyphase slide rule

Length of 1 decade = 10 in, and overall scale length = 10 in. The largest physical dimension is 10 in.

Front Scales: A [ B CI C ] D K

Back Scales: [ S L T ]

Notes: Rule in good condition; blue case; instructions;original box

References: http://sliderulemuseum.com/Papers/The_Unique_Lawrence_v3_May_2012.pdf

Date Acquired: 08/01/2020