digital clock 280zx

[JawgaZ]

I've searched every link to "clock" that I can find on the site. Does anyone know the proper hookup to bench test a 280zx digital clock? Bought one that the previous owner swore worked, can't make it myself so I'm looking for the pin hookup to bench test it. I don't want to pull out the old one unless I know the replacement works! Anyone have a clue?

Thanks