FYI
I have attached a photograph of Boyles Yukon Motor Machine Gun Battery.
The Yukon Motor Machine Gun Battery served with the 4th Canadian Division E Battery, the 1st CDN Motor Machine Gun Brigade CEF 16 August 1916.
Unit Strength 6 Officers- 94 Other Ranks
Disbanded 16 August 1916
Due to the fact this was a small unit and consulting with some old time collectors etc. I am convinced that collar badges were worn as a cap badge.
The dimension of the collar are Height 1.5 inches and Width 1.4 inches.
The cap badge is approx double the size of the collar and are RARE and expensive!
Note the picture of the collar comes from the recent auction on ebay! It sold for $800.00 US.