A protractor by ‘Watson & Sons,313 Holborn London-brass in original case marked for ‘The Miscellaneous Disposals Syndicate Ltd 41 St. James Square London W11=£100
Miniature plotting protractor by Bate-brass in original case-Lid split-signed ‘BATE’=£350
Douglas Protractor-no case-signed CHISLETT LONDON’=£550
Plotting protractor by ‘CARY’-no case=£200
Four small etui protractors=£25 each
Three Circular protractors- marked for owner ‘G.Stirling’-no maker=£80  Unsigned noting small amount of bruising to edge=£80  Dull brass protractor marked ‘G. J. Hall & Co. Ltd London and Birmingham British Made=£80
Ask the Dealer
Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.