Gruen Watch Company of Canada Limited, Levy Brothers Co. Limited, Rolex Watch Company of Canada Limited, Canadian Elgin Watch Company Limited, Bulova Watch Company Limited, Goldsmiths, Company of Canada Limited, Cyma Watch Ltd., Lorie Limited, Longines-Wittnauer Co. Of Canada, Hatch and Company Ltd. v. Attorney-General of Canada, [1950] CTC 440, [1949-1950] DTC 784 -- text