Prior to World War 2, Ranger units had Patrols, with Patrol Leaders and Patrol Emblems. Land Rangers had tree emblems, whereas Sea Ranger Patrols initially had sea birds - later they were split into watches.
1929 Trading Service Catalogue
Brick Red and Green Shoulder Knot
Green and White Shoulder Knot
Red and Green Shoulder Knot
Light Green and Fawn Shoulder Knot
Brown and Green Shoulder Knot
Brown and Yellow Shoulder Knot