For sale, a very rare set of imperial measurement plaques depicting 0 to 100 links by De Grave & Co Limited 1914.Solid brass plaques such as these were originally produced in 1876 by The Board of Trade under Sir George Airy to provide public access to British imperial standards and are reputed to have been a means to protecting the standards after the originals were destroyed in the Palace of Westminster in the 1830’s. On that basis, The Board of Trade commissioned three set from Troughton & Simms to be placed at Trafalgar Square, The Royal Observatory at Greenwich and The Guildhall, London where they can still be seen to this day.This later set is sadly of unknown origin but was produced by De Grave & Co Limited in 1914, both the zero and the one hundred plaque also bear the exchequer mark and GR for King George V.The link is a unit of measurement based upon Gunter’s chain conceived in 1620 by Edmund Gunther and formerly used in land surveying. Effectively, a metal chain 6...