My original thought was that I saw it on the MMC, but it first showed on there when I was just two or three years old. Did they show it again, later? Or was the MMC in reruns in the middle Sixties?

Can't remember clearly and too lazy/busy just now to look it up. I do know I loved to watch the variously-named versions of the Disney show on Sundays, which among many other programs showed compilations of the Zorro episodes.

I need to upgrade to a better brain. :-(