I've been on the lookout for this cancel for a while, and found it at the West Coast Stamp and Coin shop! Applied during the month of March in 1943, this slogan celebrates the centennial of Fort Victoria, first built as a trading post for The Hudson's Bay Company. 
Thank you Joan! The Victoria bastion on cachet. Since its demolition, the Nanaimo bastion below is the oldest in North America. 
Thank you Jim Miller! This pictorial postmark was applied on a proof of registration slip, and was in use from 1997-2012. 
Reproduction postcard with the Nanaimo bastion. It was moved three(!) times. This is likely the second location.