Wireless helmet Canadian Air Board July 1922 (1)

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Wireless helmet worn by personnel of the Canadian Air Board, High River, Alta., 15 July 1922. 

Credit: Canada. Dept. of National Defence/Library and Archives Canada
Restrictions on use: Nil
Copyright: Expired 
Copy negative: PA-052130
Item no. (creator) CC-148
Other accession no. 1967-052 NPC 
MIKAN no. 3643544