I spent this weekend working on my Canada collection. One sheet I'm missing is the 1982 CaPex (#913a).
By amazing coincidence, in today's mail I received a large manila envelope bearing the entire sheet.
Unharmed by marker monkeys, and mostly unharmed by spray-on, it appears to have been hand-canceled with a bit of spray on near the top right.
How's that for a LUCKY day!

KirkS