Canadian Frog and P1888 Bayonet?

I picked up an interesting P1888 bayonet, in a Canadian Pattern 1915 belt frog. I snagged it because the bayonet appeared to have escaped being overhauled multiple times, as have so many P1888 bayonets. Even the viewer's marks in the grip scales are still visible. I was hoping folks could help with the markings and fill in any historical information. During what period would this have been used: WW I, between the Wars, or as late as WW II?

https://www.milsurps.com/images/impo...4/B14061-1.jpg
https://www.milsurps.com/images/impo...4/B14066-1.jpg

Princess Louise Dragoon Guards, C Squadron?

https://www.milsurps.com/images/impo...4/B14063-1.jpg

https://www.milsurps.com/images/impo...4/B14067-1.jpg

https://www.milsurps.com/images/impo...4/B14064-1.jpg

https://www.milsurps.com/images/impo...4/B14051-1.jpghttps://www.milsurps.com/images/impo...4/B14053-1.jpg

The bayonet look's to be unit marked to Princess Louise's dragoons C squadron,rifle #24.The scabbard is marked to same battalion,not sure of the 5 D or #6 stands for.

Todd