This object is part of a collection relating to the history and development of calculating devices assembled by Assoc Professor Allan Bromley of Sydney University, comprising mathematical instruments, slide-rules, mechanical and electronic calculators, electronic analogue computers, computer components, kit computers, education computers, and associated ephemera.

Allan Bromley was a lecturer and researcher at the University of Sydney Basser Department of Computer Science from 1978 until his untimely death in August 2002. He specialised in Computer Architecture, Computer Logic and in particular the History of Computing. He was regarded as the world authority on Charles Babbage's Calculating Engines (instigating the building of the Difference Engine No.2 at the Science Museum London) and the Antikythera Mechanism and had extensive knowledge of calculators, analogue computers, logic, stereopsis, totalisators, clocks and time keeping and mechanical engineering.

The Eagle & Globe Steel Co. Ltd. was established in 1902 to handle the Australian and New Zealand business of, originally Seebohm & Dieckstahl Ltd, which was renamed Arthur Balfour & Co. Ltd. in 1915. It merged with Darwin Ltd in 1961 to form Balfour & Darwin Ltd. It is now part of Smorgon Steel.

[see: Balfour Darwin Ltd: Records relating to Australia and New Zealand [microform] : [NLA: M2527-2533] 1902-1940]

Eagle & Globe still exist in Australia. Now part of Smorgon Steel. See:

Slide chart card, duplex, Balfour Tool Steels Properties Indicator, paper, made by The Eagle & Globe Steel Co Ltd, a member of Balfour & Darwin Ltd, Australia, 1961-1970

Double-sided card giving the composition, annealing, hardness and other properties of various classes of Balfour tool making steels.

Made: 1961 - 1970

2010/1/263

1961 - 1970

10 mm

95 mm