I had an uncle who worked for Westclox back in the sixties. Visiting one day, I saw one of the new models on a table and I was mesmorized, the first digital I'd ever seen. Instead of the flipping cards thing, the numbers were just a rolling drum with numbers on each. He bought me one for Christmas. I was nine, a total geek.
This is the only one I could find that close to it.
But by far the coolest digital clocks to me anyway and I'd still love to own one, are the Nixie tube digitals. You can buy 'em in kits to build yourself, but even they're stupid expensive because Nixie tubes were phased out here in the US decades ago and replaced by LEDs. They stayed in use in Soviet parts of Russia and eastern European countries, and that's the only part of the world you can find them.