Jack,
My first car was a 1928 Ford Model A rumble seat coupe when I got my driver's license at age 14. I found a 1929 Furd brochure in the site. Lots of car guys here probably don't know what a Model A is. As you said, only us old farts remember them.
There were quite a few Model As around when I was a child in the '40s and teen in the '50s but I had never been exposed to a Model T except seeing one or two in parades. Last summer I rode in several of them. Henry Ford's Greenfield Village next to the Ford Museum in Dearborn uses a fleet of about 10 restored Ts to move tourist visitors around in the village. Riding in them and seeing a disassembled and cutaway example in the museum solved the mystery for me after wondering about them all these years. As you probably remember, they used a planetary transmission with two forward speeds, low and high. Pushing the left pedal to the floor provided low gear, releasing the pedal provided high.