Hiya PMC,
Yep, I do remember Chetwyn's, but never shopped there because to me they seemed stuck in a 1950's time-warp (or so I recall).
There was a really good tailor in The Parade, Sutton Coldfield - can't remember the name of the shop, and I don't think it's there any more. I bought a suit there in about 1975 - pure wool, charcoal, very faint pin-stripe, classic cut, and I still wear the trousers (not in my house, I hear the missus say!). The jacket, sadly, no longer stretches around my somewhat expanded upper body.
I think the consensus, looking at the posts to this thread, is that clothes in the Sixties were made, as my gran would put it, 'with a red-hot needle and burning thread'!
Suits you, sir!
Big Gee