The Canadian Provost Corps preceded the Military Police.
A cap badge, also known as head badge or hat badge, is worn on uniform headgear and distinguishes the wearer’s nationality and/or organization.
Collar dogs are paired patches of cloth or metal insignia on the collar of a (dress) uniform.
An Officer’s pattern cap badge is shown at (#1). An Other Rank’s (OR) pattern of cap badge is shown at (#3).
Metal shoulder titles, 1939-1945, are distinctive metal titles that were worn on (dress) uniform shoulders (#2).
Brass OR collar dogs are shown in the photo. There are left and right collar dogs facing each other (#4).
WWII Cap Badge (1940) C PRO C/Military Police (5).
In 1953, when Queen Elizabeth II took the throne, the Royal Crown on cap and collar badges design was changed from the Tudor (King’s) Crown to the Saint Edward (Queen’s) Crown. These patterns of badges were still commonly worn in the early 1970s.