'Magnum' Circular Slide Rule, by Fowler & Co., Manchester, c. 1925

Subject: Calculation; Mathematical instruments
Item type: Object
Makers: Fowler & Co
Primary inscriptions: At centre: 'Fowler's Patent Long Scale Calculator "Magnum" Fowler & Co. Manchester'. Serial no. 229 on chrome back.
Physical material: Chrome; Plastic; Steel; Leather
Object type: Slide rule
Inventory No: 34185
Accession Number: ?1939-10

Description

Chrome and plastic, with steel knobs and suspension ring. In very sturdy leather case or pouch with two press-studs.