Collections Online Pamphlet. Instructions for The Mechanical Engineer Pocket Calculator, By The Scientific Publishing Co., Manchester, Late 19th Century orEarly 20th Century
Pamphlet. Instructions for The Mechanical Engineer Pocket Calculator, By The Scientific Publishing Co., Manchester, Late 19th Century orEarly 20th Century Inventory Number 15311
Object type Instructions
Inventory No 15311 Pamphlet. Advertisement for The Halden Calculex, Improved Pattern, By J. Halden & Co., Manchester, Early 20th Century Inventory Number 15310 Edmondson Circular Mechanical Calculator, by Blakey Emmott & Co., Halifax, English, Late 19th Century Inventory Number 49641 Mechanical Calculator, by Facit, Sweden, 20th Century Inventory Number 88677 Print, Advertisement for the "Knowledge" Circular Slide Rule Calculator, London, Late 19th - Early 20th Century Inventory Number 13670 
Edmondson Circular Mechanical Calculator, by Blakey Emmott & Co., Halifax, English, Late 19th CenturyInventory Number 49641
Print, Advertisement for the "Knowledge" Circular Slide Rule Calculator, London, Late 19th - Early 20th CenturyInventory Number 13670