Danica pointed out these soon-to-be-obscured air vents and we recorded them before a condo goes up on the site next door. They are probably copper, judging by the patina. Lovely things atop a grand old Toronto Hydro utility building. Man, they built things well, once upon a time. The vents turn in the wind, thanks to their distinctive vanes.
Eagle-eyed viewers will have have noticed that the flag is distinctive, too. There’s a close-up after the break. I call it Old Sorry.