Well, I have fond memories of the place. Charton's Coins and Stamps were on the first floor in the 1970s. My friend and I would make regular trips to buy stamps.
OMG, I was going to hold my tongue and not mention the same comment, after seeing the CityTV building photo. I'll amend a short comment -- I used to buy stamps at that shop around 1974-1976, and on weekend's at the "Old City Hall" (second floor, King St. location) in the 1970's. Of the very few memories which have remained in my brain, it was of the CityTV building's stamp shop. I always kept in mind that it was like "going into an old saloon, all dusty, old and ready to be torn down due to being condemned". I recall it had high white-washed ceilings with old lighting. Whether these memories are correct I don't know, but I think the stamp shop was at the most eastern side of the building along Queen West. About 4 years later I'd spend most of the next decade at Arkon and Active Surplus on Queen (just after they moved from Queen East), the latter which still exists (but not in the same "dusty and ancient" lower-level HQ).
Some added info: the guy who ran that stamp shop used to be a professional photographer, part of the PPOC association, then got into stamps. About 3-4 years ago I was attending one of those winter stamp shows in Toronto and had mentioned about this stamp guy, the "owner of the Queen St" shop (whose name alludes me right now). It was mentioned at the show that he passed away a few years ago.