The Canada with the Maple leaf Badges on the Right 3 rows down are WWI whoever they used the same Badges in WWII, even though they had Two new types casted. Also used in the Boer Wars. Since Regiments didn't have Regimental Cap badges and they continued using these badges that were used by CEF in WWI and WWII during training, and as transitional badges for troops awaiting assignment to battalions.
Canadian Medical Corps Badges all on the Bottom row.
Whoever the 2 Badges RCA on first picture bottom starting from the left 5 and the 6th which is slightly higher are interesting in the Colour and Style made