These items are not for sale and the descriptions, images and prices are for reference purposes only.

A Waddington's circular slide Rule, 'Lord's Calculator' made circa nickel plated case (AF-case wear verso) dial marked 'Lord's Calculator, R. Waddington, Coventry'. Diameter 7 cm

A vintage New Zealand brass slide rule, W. Littlejohn & Son. Wellington. in original wood case. Length 61 cm

An Aston and Mander Ltd London metal slide rule together with a brass and ebony parallel rule