"Aristocrat" slide rule, with case

Made:
1925 in Derby
maker:
John Davis and Son (Derby) Limited

"Aristocrat" slide rule, with magnifying cursor, by John Davis & Son (Derby) Limited, length 5 7/8-inch in case.

Details

Category:
Mathematics
Object Number:
1925-90
type:
slide rule
credit:
Kindly donated by Davis Derby Limited

Parts

Case for "Aristocrat" slide rule

Case for "Aristocrat" slide rule

Case for "Aristocrat" slide rule, with magnifying cursor; length 5 7/8"

Object Number:
1925-90 Pt1
type:
instrument case