My type 1b design is basically the same as type 1a, streamlined for mass production - the main change was to use a more powerful microcontroller chip that allowed me to eliminate several components. The only user-visible change is that it now has the test/demo mode that my 2-digit designs have.
JavaScript animated clock mockup
Here's a mockup of what the clock actually looks like in operation. The time initially shown here is 7:38 (it could be either AM and PM, there's no way to tell other than using a 24-hour display format).