Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,206 pages of information and 209,718 images on early companies, their products and the people who designed and built them.

Allan Caldwell

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Allan Caldwell (c1891- )

Director, Messrs. Constants, Ltd, Billiter Square, London, E.C.3.


  • Assistant chief draughtsman, Ibrox Iron Works
  • Chief draughtsman, Montrose Shipbuilding Co.
  • 1910 Naval Architect and Ship and Engine Surveyor with Messrs. Constants.

Designer of earliest Diesel and Diesel-Electric Thames Tugs.

Consultant of principal British Dredging Contractors and Thames Tug Owners.

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