I have a ScopeClock Duo from Sgitheach. See attached, very pleased with it. Plus Graham is a pleasure to deal with. Open software/open hardware. One of my favourite features is the PIR sensor with soft start, which reduces the current to the heater when it's still cold, extending its life. Very clever.
I'm currently working on a solar nixie watch. As soon as I'm done, I'll try to work out the maths for the custom transformer of the ScopeClock by Cathode Corner. I like how that clock has a relatively compact design. I'll make only one or two clocks.