Lindsay headstamped their first year of production as LAC, then switched to the DAL. I have photos of DAL 1919 and 1920, only actually own LAC 1917, DAL 1918 and DAL 1919.
Ross DID produce a small amount of .303 ammo at Quebec City but insisted on using his own bullets. It was rejected by the British. The .28 Ross experimental was headstamped at noon and 6 o'clock as ROSS E; it was made on contract by Eley in England. This was the forerunner of the .280 Ross. Some .280 ammo was asembled at Quebec by Ross, using imported components from several sources. When the factory was sold off for scrap, they had to dispose of 15 million part-finished .303 bullet jackets: enough to wear out every .303 I own 50 times over and then some!
North American Arms M1911 was produced in the Ross factory after it was seized by the Gummint.
.