This is becoming a bit confusing even for myself. I could not find a name for the board powering the "Wise Clock 3", so I just named it "Wise Clock 3" board. On the other hand, the board that powers "Wise Clock 2" is Duino644. It sounds a bit silly, I know. I am still debating on the name for the new board and I am also open to suggestions. Until I find a better name, here is some help to clear the confusion.
"Wise Clock 3" is pictured on the left. It has a wider display (32x16, bi-color). The green board, as I mentioned, is called (for now) "Wise Clock 3 board".
"Wise Clock 2" is on the right side of the photo. It has a 24x16 single-color (either red or green) display. It is powered by the black board, named "Duino644".
Both Wise Clock 2 and Wise Clock 3 have similar functionality, but the latter has more features allowed by the bigger and better display. In the photo below they are working side by side.
Rubidium Disciplined Atomic Clock
14 hours ago