Going back to my Post #687:
To clarify, the DHC-1B-2-S5 (the last version of the Chipmunk built) was known in RCAF service as the Chipmunk T.30.
This is not correct! The "T.30" designation turns out to be a myth, stemming I suspect from a modelling magazine caption, and repeated (embarrassingly, by me too) ever since. Their RCAF designation was CT-120.