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John Blackie of the Manitoba Classic and Antique Auto Club identified the make of this Diamond cab as a Chalmers. Diamond's president, Arthur T. Henderson, was one of George Moore's chief antagonists. The company started in 1923 and went out of business in 1934, a victim of the Winnipeg taxi war.
Source:
1920s. Diamond Taxi. Photo by W.E. Fillery. Archives Manitoba, Transportation - Automobile - Taxi 3 (Negative N4204).
Winnipeg Cab History / 56
"Old Line" Companies (1)
The rapid increase in motor cabs during the 1920s had a serious impact on the incomes of the established "old line" taxicab firms like Diamond, Bradley and Black & White and on their drivers.
The Depression only made things worse. Large numbers of jobless car owners increasingly turned to legal or illegal cab driving as a matter of survival. This simply intensified the price-cutting war.
If enforcement of the cab bylaw was lax during the 1920s, it became increasingly so as the Depression deepened. Now that so many desperate people depended on cab driving to eke out a living police, courts and polititians were even less eager to enforce the bylaw.
Matters came to a head in 1930 when several established taxi cab firms, among them Diamond and Black & White, formally petitioned the Winnipeg city council to enforce the minimum cab fare. The petitioners insisted on their need for protection from the cut-rate and illegal cabs.