Canada - Canary Islands. (Undercover Mail). 1945 Air Mail envelope addressed to 'The British Consulate, Santa Cruz de Tenerife' bearing Canada SG 378, 3c purple (2) and SG 380, 4c carmine tied by Saskatoon ate stamp with 'Opened by Examiner/DB' label routed via New York with censor tape and 'Opened by Examiner/ 9033' censor tape. Nice item.
The red vertical line Jusqu'a mark applied at Office of Exchange.