The DDC 1916
I have a sneaky suspicion it's affiliated with the auto industry Canada to U.S
Durant- Dort- Carriage DDC
Apart from the partnership in the D.-D. Carriage Company, J. Dallas Dort seems to have been one of Durant’s close backers in other ventures involving the new automotive industry as well, and ultimately traded the Imperial Wheel Factory in Hamilton Avenue, Flint for Chevrolet Motor Company stock to give him the necessary equity rights to secure the moving of the Chevrolet company activities to Flint, and also bought Sterling stock on the basis that this company would make "sixes" for the Chevrolet Type C, the Little Six, and Light Six]. However, "Bill" Little moved from Chevrolets to Sterlings, and subsequently bought a majority equity holding in an early form of ‘management buyout’ in September

1913 [basically, Little swapped his Chevrolet shares for Sterling shares, sometime between June and October 1913]. The Chevrolet and Durant-Dort Companies were closely connected at this stage: Dort was a stockholder, and elected Vice president and a director of Chevrolet Motor Company at the same time that Durant was President in late 1912 until he resigned in mid-may 1913, the reasons still being a mystery, all at the same time more-or-less. The Chevrolet General Manager, David M. Averill was on sabbatical from the Durant-Dort Company and was placed in charge of the Detroit Chevrolet operations.
When Dort backed-out of his involvement in Chevrolet and resigned, he and Durant went their separate ways and by 1915, Durant had either sold or exchanged his Durant-Dort Company stock for General Motors’, increasing his personal holdings.This probably explains what happened to the Canadian carriage works: see below.
The Toronto Directories state that A.G. Howse was the Vice-president of the D.C.C., and was based in London, Ontario, which suggests that Durant had another operation in London: was this the Durant-Dort Carriage Company Limited, or another company?
The Company was dissolved in 1917.
http://clubs.hemmings.com/clubsites/chevytalk/GMhistory/earlygmcanadhistory.htm