To answer any other questions you may have about Canadian helmets, you might want to consider purchasing a copy of Tin Lids by Roger Lucy published by Service Publications. Tin Lids is a detailed history of the acquisition and use of steel helmets in the Canadian Army. Includes British patterns as well as Canadian development. A complete description of Infantry, Tanker, DR and Airborne patterns. Covers all Canadian useage and Canadian designs. Concludes with the modern Canadian PASGT model. It would be $22.00 well spent.
https://www.combat-relics.com/books