So while I was putzing around looking at datasheets for similar displays I almost always noticed one thing.
The segment pins always have a current limiting resistor on them to prevent the LED from frying.
So I grabbed the PCB that I pulled this display out of and found out this. All segment pin holes are highlighted red, with a tail pointing to the component I traced that is evidence of the pin type. All digit select pins are green.
This however, causes a bit of a problem for me, as you can see, I have EIGHT segment pins and only 4 Digit Pins. I was hoping that there would be five digit pins so as to select the "dot" digit and light either the colon, period, or asterisk. So that means that the asterisk must be selected by some other means? Maybe a certain voltage to the "dot segment pin"?
This oven display does use more than the colon, when selecting bake, you find that the degrees symbol lights up.
Well, food for thought I guess.
Edit: One other thing that I noticed. There are test points in the upper left of this PCB that has a ground test point and a 3.3v test point, so I would assume that the board as a whole is operating on a 3.3V DC current.