In navy parlance, this helmet is for a Sick Berth Attendant (Medic in army speak).
This one nicely marked to "DOC" along with the owners name and number: V547 H.Treller Volunteer Reserve). This helmet is made by the Canadian Lamp Company 1941. His name and number and SBA (Sick Berth Attendant) is written inside the helmet).
This one nicely marked to "DOC" along with the owners name and number: V547 H.Treller Volunteer Reserve). This helmet is made by the Canadian Lamp Company 1941. His name and number and SBA (Sick Berth Attendant) is written inside the helmet).